/* ============================================================
   NAVIGATION FOR TRAVELERS
   PATHFINDER PREMIUM EDITION
   MAIN DESIGN SYSTEM
============================================================ */


/* ================= ROOT VARIABLES ================= */

:root {

    --bg-primary: #080d19;
    --bg-secondary: #0b1220;
    --bg-tertiary: #101b2d;

    --surface: rgba(17, 29, 48, 0.78);
    --surface-light: rgba(27, 44, 67, 0.72);
    --surface-hover: rgba(37, 58, 86, 0.85);

    --border: rgba(148, 180, 218, 0.12);
    --border-light: rgba(148, 180, 218, 0.2);

    --cyan: #22d3ee;
    --cyan-light: #67e8f9;
    --blue: #3b82f6;
    --blue-light: #60a5fa;
    --purple: #a78bfa;

    --green: #22c55e;
    --green-light: #86efac;

    --red: #fb4b68;
    --orange: #fb923c;
    --yellow: #facc15;

    --text-primary: #f1f5f9;
    --text-secondary: #a5b4c8;
    --text-muted: #708198;

    --font-main: "Inter", sans-serif;
    --font-heading: "Outfit", sans-serif;
    --font-mono: "DM Mono", monospace;

    --radius-sm: 9px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;

    --shadow:
        0 15px 45px rgba(0, 0, 0, 0.25);

    --shadow-glow:
        0 0 25px rgba(34, 211, 238, 0.12);

    --cell-size: 25px;
    --cell-gap: 3px;

}


/* ================= GLOBAL RESET ================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: #263d59 #080d19;
}

body {

    min-height: 100vh;

    background: var(--bg-primary);

    color: var(--text-primary);

    font-family: var(--font-main);

    overflow-x: hidden;

    line-height: 1.5;

    -webkit-font-smoothing: antialiased;

}

button,
input,
select {
    font: inherit;
}

button {
    border: none;
    outline: none;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 4px;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
    transform: none !important;
}

::selection {
    background: rgba(34, 211, 238, 0.3);
    color: white;
}


/* ================= SCROLLBAR ================= */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #080d19;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(
        180deg,
        #164e63,
        #2563eb
    );

    border-radius: 20px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--cyan);
}


/* ================= BACKGROUND ================= */

.background-effects {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

.ambient {

    position: absolute;

    width: 500px;
    height: 500px;

    border-radius: 50%;

    filter: blur(120px);

    opacity: 0.13;

}

.ambient-one {

    background: #087fba;

    top: -200px;
    left: -150px;

}

.ambient-two {

    background: #4932a5;

    right: -200px;
    top: 25%;

}

.ambient-three {

    background: #0e7490;

    bottom: -300px;
    left: 35%;

}

.background-grid {

    position: absolute;
    inset: 0;

    background-image:

        linear-gradient(
            rgba(148, 180, 218, 0.025) 1px,
            transparent 1px
        ),

        linear-gradient(
            90deg,
            rgba(148, 180, 218, 0.025) 1px,
            transparent 1px
        );

    background-size: 45px 45px;

    mask-image: linear-gradient(
        to bottom,
        black,
        transparent 95%
    );

}


/* ================= APPLICATION WRAPPER ================= */

.app-wrapper {

    width: min(1600px, 100%);

    margin: auto;

    padding: 25px 35px 35px;

    position: relative;

}


/* ================= HEADER ================= */

.main-header {

    min-height: 75px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 20px;

    padding: 15px 22px;

    border: 1px solid var(--border);

    border-radius: var(--radius-lg);

    background: rgba(11, 19, 33, 0.82);

    backdrop-filter: blur(22px);

    box-shadow: var(--shadow);

}

.brand-area {

    display: flex;

    align-items: center;

    gap: 14px;

}

.brand-icon {

    width: 47px;
    height: 47px;

    display: grid;
    place-items: center;

    border-radius: 14px;

    background: linear-gradient(
        135deg,
        #0e7490,
        #2563eb
    );

    position: relative;

    color: white;

    font-size: 23px;

    box-shadow: 0 0 25px rgba(34, 211, 238, 0.22);

}

.brand-icon-glow {

    position: absolute;

    inset: -4px;

    border: 1px solid rgba(34, 211, 238, 0.35);

    border-radius: 17px;

}

.brand-details h1 {

    font-family: var(--font-heading);

    font-size: 21px;

    letter-spacing: 2px;

    font-weight: 800;

}

.brand-details h1 span {
    color: var(--cyan);
}

.brand-details p {

    font-size: 9px;

    color: var(--text-muted);

    letter-spacing: 2.1px;

    font-weight: 700;

    margin-top: 2px;

}

.header-center {
    display: flex;
    justify-content: center;
}

.system-status {

    display: flex;

    align-items: center;

    gap: 9px;

    font-size: 10px;

    letter-spacing: 1.2px;

    font-weight: 700;

    color: var(--green-light);

}

.status-indicator,
.live-dot {

    width: 8px;
    height: 8px;

    border-radius: 50%;

    background: var(--green);

    box-shadow: 0 0 12px var(--green);

    flex-shrink: 0;

}

.header-actions {

    display: flex;

    align-items: center;

    gap: 12px;

}

.header-icon-btn {

    width: 39px;
    height: 39px;

    border: 1px solid var(--border);

    border-radius: 11px;

    background: var(--surface);

    color: var(--text-secondary);

    cursor: pointer;

    font-size: 15px;

    transition: 0.3s ease;

}

.header-icon-btn:hover {

    color: var(--cyan);

    background: rgba(34, 211, 238, 0.1);

    border-color: rgba(34, 211, 238, 0.4);

    transform: translateY(-2px);

}

.header-icon-btn.muted {
    color: var(--red);
}

.version-badge {

    display: flex;

    flex-direction: column;

    padding: 5px 12px;

    background: rgba(34, 211, 238, 0.07);

    border: 1px solid rgba(34, 211, 238, 0.16);

    border-radius: 9px;

}

.version-badge span {

    font-size: 8px;

    color: var(--text-muted);

    letter-spacing: 1px;

}

.version-badge strong {

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 13px;

}


/* ================= HERO SECTION ================= */

.hero-section {

    min-height: 230px;

    position: relative;

    display: flex;

    align-items: center;

    justify-content: center;

    text-align: center;

    padding: 45px 20px;

    overflow: hidden;

}

.hero-content {
    position: relative;
    z-index: 2;
}

.eyebrow {

    display: flex;

    justify-content: center;

    align-items: center;

    gap: 12px;

    font-size: 10px;

    letter-spacing: 3px;

    color: var(--cyan);

    font-weight: 700;

    margin-bottom: 16px;

}

.eyebrow-line {

    width: 28px;

    height: 1px;

    background: var(--cyan);

    opacity: 0.6;

}

.hero-section h2 {

    font-family: var(--font-heading);

    font-size: clamp(38px, 5vw, 58px);

    line-height: 1.12;

    font-weight: 800;

    letter-spacing: -1.8px;

}

.gradient-text {

    background: linear-gradient(
        90deg,
        #67e8f9,
        #3b82f6,
        #a78bfa
    );

    background-clip: text;

    -webkit-background-clip: text;

    -webkit-text-fill-color: transparent;

}

.hero-content > p {

    margin-top: 15px;

    color: var(--text-secondary);

    font-size: 14px;

    max-width: 580px;

    margin-inline: auto;

    line-height: 1.8;

}

.hero-decoration {

    position: absolute;

    right: 8%;

    top: 50%;

    transform: translateY(-50%);

    width: 155px;
    height: 155px;

    display: grid;

    place-items: center;

    opacity: 0.45;

}

.decoration-ring {

    position: absolute;

    inset: 0;

    border: 1px solid rgba(34, 211, 238, 0.3);

    border-radius: 50%;

}

.ring-two {

    inset: 19px;

    border-style: dashed;

    border-color: rgba(96, 165, 250, 0.35);

}

.decoration-center {

    width: 55px;
    height: 55px;

    border-radius: 50%;

    display: grid;

    place-items: center;

    color: var(--cyan);

    font-size: 27px;

    background: rgba(34, 211, 238, 0.08);

    border: 1px solid rgba(34, 211, 238, 0.3);

}


/* ================= STATISTICS ================= */

.stats-section {

    display: grid;

    grid-template-columns: repeat(4, 1fr);

    gap: 17px;

    margin-bottom: 25px;

}

.stat-card {

    min-height: 112px;

    display: flex;

    align-items: center;

    gap: 15px;

    padding: 20px;

    border-radius: var(--radius-lg);

    border: 1px solid var(--border);

    background: var(--surface);

    backdrop-filter: blur(16px);

    position: relative;

    overflow: hidden;

    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);

    transition: 0.3s ease;

}

.stat-card:hover {

    border-color: rgba(34, 211, 238, 0.3);

    transform: translateY(-4px);

    box-shadow: var(--shadow-glow);

}

.stat-icon {

    width: 45px;
    height: 45px;

    flex-shrink: 0;

    border-radius: 13px;

    display: grid;

    place-items: center;

    font-size: 18px;

}

.start-stat-icon {

    color: var(--green-light);

    background: rgba(34, 197, 94, 0.13);

}

.end-stat-icon {

    color: var(--red);

    background: rgba(251, 75, 104, 0.13);

}

.distance-stat-icon {

    color: var(--cyan);

    background: rgba(34, 211, 238, 0.13);

}

.time-stat-icon {

    color: var(--purple);

    background: rgba(167, 139, 250, 0.13);

}

.stat-content {
    min-width: 0;
    position: relative;
    z-index: 1;
}

.stat-label {

    display: block;

    font-size: 9px;

    font-weight: 800;

    letter-spacing: 1.2px;

    color: var(--text-muted);

}

.stat-content h3 {

    font-family: var(--font-heading);

    font-size: 19px;

    margin: 5px 0 2px;

    font-weight: 700;

    white-space: nowrap;

}

.stat-content h3 small {

    font-size: 11px;

    font-weight: 500;

    color: var(--text-secondary);

}

.stat-subtitle {

    font-size: 10px;

    color: var(--text-muted);

}

.stat-card-decoration {

    position: absolute;

    width: 75px;
    height: 75px;

    border: 1px solid rgba(34, 211, 238, 0.07);

    border-radius: 50%;

    right: -25px;
    bottom: -30px;

}


/* ================= WORKSPACE ================= */

.workspace {

    display: grid;

    grid-template-columns: 315px minmax(0, 1fr);

    gap: 20px;

    align-items: stretch;

}


/* ================= CONTROL PANEL ================= */

.control-panel {

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: var(--radius-xl);

    padding: 24px;

    backdrop-filter: blur(20px);

    box-shadow: var(--shadow);

    display: flex;

    flex-direction: column;

    min-width: 0;

}

.panel-heading {

    display: flex;

    justify-content: space-between;

    align-items: center;

    margin-bottom: 27px;

}

.section-kicker {

    color: var(--cyan);

    font-size: 9px;

    font-weight: 800;

    letter-spacing: 1.8px;

}

.panel-heading h3,
.visualizer-title h3,
.analytics-header h3,
.algorithm-info-heading h3 {

    font-family: var(--font-heading);

    font-size: 20px;

    margin-top: 3px;

    font-weight: 700;

}

.panel-heading-icon {

    width: 40px;
    height: 40px;

    border-radius: 12px;

    display: grid;

    place-items: center;

    color: var(--cyan);

    background: rgba(34, 211, 238, 0.09);

    border: 1px solid rgba(34, 211, 238, 0.14);

}

.group-title {

    display: flex;

    align-items: center;

    gap: 10px;

    margin-bottom: 16px;

}

.group-title > span {

    font-family: var(--font-mono);

    color: var(--cyan);

    font-size: 10px;

    font-weight: bold;

}

.group-title h4 {

    color: var(--text-secondary);

    font-size: 10px;

    letter-spacing: 1px;

    font-weight: 800;

}

.control-group {
    margin-bottom: 20px;
}

.panel-divider {

    height: 1px;

    background: var(--border);

    margin-bottom: 21px;

}


/* ================= TOOL BUTTONS ================= */

.tool-grid {

    display: grid;

    grid-template-columns: repeat(2, 1fr);

    gap: 10px;

}

.tool-btn {

    min-height: 89px;

    padding: 12px 8px;

    position: relative;

    display: flex;

    flex-direction: column;

    align-items: center;

    justify-content: center;

    gap: 8px;

    border: 1px solid var(--border);

    border-radius: 13px;

    background: rgba(9, 17, 30, 0.65);

    color: var(--text-secondary);

    cursor: pointer;

    transition: 0.28s ease;

}

.tool-btn:hover {

    border-color: rgba(34, 211, 238, 0.4);

    background: rgba(34, 211, 238, 0.06);

    transform: translateY(-3px);

    color: white;

}

.tool-btn.active {

    background: linear-gradient(
        145deg,
        rgba(8, 145, 178, 0.2),
        rgba(37, 99, 235, 0.13)
    );

    border-color: rgba(34, 211, 238, 0.65);

    color: white;

    box-shadow:
        inset 0 0 20px rgba(34, 211, 238, 0.06),
        0 0 17px rgba(34, 211, 238, 0.1);

}

.tool-icon {

    font-size: 19px;

}

.start-tool {
    color: var(--green);
}

.end-tool {
    color: var(--red);
}

.obstacle-tool {
    color: #a5b4c8;
}

.erase-tool {
    color: var(--orange);
}

.tool-name {

    font-size: 11px;

    font-weight: 700;

}

.tool-shortcut {

    position: absolute;

    top: 7px;
    right: 8px;

    font-family: var(--font-mono);

    font-size: 9px;

    color: var(--text-muted);

}

.tool-hint {

    display: flex;

    gap: 8px;

    align-items: flex-start;

    font-size: 10px;

    line-height: 1.7;

    color: var(--text-muted);

    margin-top: 12px;

}

.tool-hint i {
    color: var(--cyan);
    margin-top: 3px;
}


/* ================= SELECT INPUTS ================= */

.select-wrapper {

    position: relative;

    display: flex;

    align-items: center;

}

.select-wrapper select,
.small-select {

    width: 100%;

    appearance: none;

    padding: 13px 38px;

    border: 1px solid var(--border-light);

    border-radius: 11px;

    background: #101d30;

    color: var(--text-primary);

    cursor: pointer;

    font-size: 12px;

    font-weight: 600;

    transition: 0.25s ease;

}

.select-wrapper select:hover,
.small-select:hover {

    border-color: rgba(34, 211, 238, 0.4);

}

.select-wrapper select option,
.small-select option {
    background: #101d30;
    color: white;
}

.select-icon {

    position: absolute;

    left: 14px;

    color: var(--cyan);

    font-size: 13px;

    pointer-events: none;

    z-index: 1;

}

.select-arrow {

    position: absolute;

    right: 14px;

    color: var(--text-muted);

    font-size: 10px;

    pointer-events: none;

}

.algorithm-description {

    display: flex;

    align-items: flex-start;

    gap: 9px;

    margin-top: 11px;

    padding: 10px;

    border-radius: 9px;

    background: rgba(34, 211, 238, 0.045);

    border: 1px solid rgba(34, 211, 238, 0.08);

}

.algorithm-description p {

    font-size: 10px;

    color: var(--text-secondary);

    line-height: 1.6;

}

.algorithm-dot {

    width: 6px;
    height: 6px;

    border-radius: 50%;

    background: var(--cyan);

    flex-shrink: 0;

    margin-top: 5px;

}


/* ================= SPEED CONTROL ================= */

.speed-heading {

    display: flex;

    justify-content: space-between;

    font-size: 11px;

    color: var(--text-secondary);

    margin-bottom: 14px;

}

.speed-heading strong {

    color: var(--cyan);

    font-size: 11px;

}

.custom-range {

    width: 100%;

    appearance: none;

    height: 5px;

    border-radius: 20px;

    background: #26364a;

    outline: none;

    cursor: pointer;

}

.custom-range::-webkit-slider-thumb {

    appearance: none;

    width: 15px;
    height: 15px;

    border-radius: 50%;

    background: var(--cyan);

    border: 3px solid #0c1a2c;

    box-shadow: 0 0 12px rgba(34, 211, 238, 0.7);

    cursor: grab;

}

.custom-range::-moz-range-thumb {

    width: 15px;
    height: 15px;

    border-radius: 50%;

    background: var(--cyan);

    border: 3px solid #0c1a2c;

    cursor: grab;

}

.range-labels {

    display: flex;

    justify-content: space-between;

    font-size: 9px;

    color: var(--text-muted);

    margin-top: 9px;

}


/* ================= SETTINGS ================= */

.setting-row {

    display: flex;

    justify-content: space-between;

    align-items: center;

    gap: 10px;

    margin-bottom: 16px;

}

.setting-info {

    display: flex;

    align-items: center;

    gap: 10px;

    font-size: 11px;

    color: var(--text-secondary);

}

.setting-info i {

    color: var(--cyan);

    width: 15px;

    text-align: center;

}

.small-select {

    width: auto;

    padding: 8px 27px 8px 10px;

    font-size: 10px;

}


/* ================= SWITCHES ================= */

.switch {

    position: relative;

    display: inline-block;

    width: 36px;
    height: 20px;

    flex-shrink: 0;

}

.switch input {

    opacity: 0;

    width: 0;
    height: 0;

}

.switch-slider {

    position: absolute;

    inset: 0;

    border-radius: 30px;

    background: #26364a;

    cursor: pointer;

    transition: 0.3s;

}

.switch-slider::before {

    content: "";

    position: absolute;

    width: 14px;
    height: 14px;

    left: 3px;
    top: 3px;

    border-radius: 50%;

    background: #9caec2;

    transition: 0.3s;

}

.switch input:checked + .switch-slider {

    background: rgba(34, 211, 238, 0.3);

}

.switch input:checked + .switch-slider::before {

    transform: translateX(16px);

    background: var(--cyan);

    box-shadow: 0 0 8px var(--cyan);

}


/* ================= SECONDARY BUTTON ================= */

.secondary-action-btn {

    display: flex;

    align-items: center;

    justify-content: center;

    gap: 9px;

    padding: 12px;

    width: 100%;

    border: 1px solid var(--border-light);

    border-radius: 10px;

    background: rgba(34, 211, 238, 0.06);

    color: var(--cyan);

    font-size: 11px;

    font-weight: 700;

    cursor: pointer;

    transition: 0.3s ease;

}

.secondary-action-btn:hover {

    background: rgba(34, 211, 238, 0.15);

    border-color: var(--cyan);

    box-shadow: 0 0 15px rgba(34, 211, 238, 0.12);

    transform: translateY(-2px);

}

.panel-footer {

    margin-top: auto;

    padding-top: 17px;

    border-top: 1px solid var(--border);

    display: flex;

    align-items: center;

    gap: 9px;

    font-family: var(--font-mono);

    font-size: 9px;

    letter-spacing: 1px;

    color: var(--green-light);

}


/* ================= VISUALIZER PANEL ================= */

.visualizer-panel {

    min-width: 0;

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: var(--radius-xl);

    padding: 24px;

    backdrop-filter: blur(20px);

    box-shadow: var(--shadow);

}

.visualizer-header {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 15px;

    margin-bottom: 20px;

}

.visualizer-title {

    display: flex;

    align-items: center;

    gap: 13px;

}

.visualizer-icon {

    width: 43px;
    height: 43px;

    display: grid;

    place-items: center;

    color: var(--cyan);

    background: rgba(34, 211, 238, 0.09);

    border: 1px solid rgba(34, 211, 238, 0.15);

    border-radius: 13px;

    font-size: 17px;

}

.grid-status {

    display: flex;

    align-items: center;

    gap: 9px;

    padding: 8px 12px;

    background: rgba(34, 211, 238, 0.05);

    border: 1px solid rgba(34, 211, 238, 0.13);

    border-radius: 30px;

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 9px;

    white-space: nowrap;

}

.grid-status .status-indicator {

    width: 6px;
    height: 6px;

    background: var(--cyan);

    box-shadow: 0 0 9px var(--cyan);

}


/* ================= GRID TOOLBAR ================= */

.grid-toolbar {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 12px;

    margin-bottom: 14px;

    flex-wrap: wrap;

}

.grid-toolbar-left,
.grid-toolbar-right {

    display: flex;

    align-items: center;

    gap: 12px;

}

.grid-coordinate {

    display: flex;

    align-items: center;

    gap: 8px;

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 10px;

    font-weight: 700;

}

.toolbar-divider {

    width: 1px;

    height: 16px;

    background: var(--border-light);

}

.grid-instruction {

    font-size: 10px;

    color: var(--text-muted);

}

.mini-tool-btn {

    width: 32px;
    height: 32px;

    border: 1px solid var(--border);

    border-radius: 9px;

    background: #111e30;

    color: var(--text-secondary);

    cursor: pointer;

    transition: 0.25s;

}

.mini-tool-btn:hover {

    color: var(--cyan);

    border-color: var(--cyan);

    background: rgba(34, 211, 238, 0.1);

}


/* ================= GRID STAGE ================= */

.grid-stage {

    position: relative;

    min-height: 350px;

    display: flex;

    align-items: center;

    justify-content: center;

    overflow: auto;

    padding: 20px 8px;

    border: 1px solid rgba(148, 180, 218, 0.11);

    border-radius: 16px;

    background:

        radial-gradient(
            circle at 50% 50%,
            rgba(20, 55, 85, 0.3),
            transparent 65%
        ),

        rgba(5, 12, 23, 0.75);

}

.grid-container {

    display: flex;

    flex-direction: column;

    align-items: center;

    width: max-content;

    margin: auto;

}

.grid-middle {

    display: flex;

    align-items: center;

}

.grid {

    display: grid;

    grid-template-columns:
        repeat(20, var(--cell-size));

    grid-template-rows:
        repeat(20, var(--cell-size));

    gap: var(--cell-gap);

    padding: 10px;

    border: 1px solid rgba(34, 211, 238, 0.12);

    border-radius: 9px;

    background: rgba(8, 18, 32, 0.85);

    box-shadow:
        0 0 35px rgba(0, 0, 0, 0.3),
        inset 0 0 20px rgba(34, 211, 238, 0.025);

    touch-action: pan-x pan-y;

    user-select: none;

}

.cell {

    width: var(--cell-size);

    height: var(--cell-size);

    background: #dce8f5;

    border: 1px solid rgba(30, 60, 90, 0.15);

    border-radius: 3px;

    cursor: crosshair;

    position: relative;

    transition:
        background-color 0.16s ease,
        box-shadow 0.16s ease,
        transform 0.16s ease;

}

.cell:hover {

    background: var(--cyan-light);

    transform: scale(1.1);

    z-index: 2;

    box-shadow: 0 0 12px rgba(34, 211, 238, 0.65);

}


/* ================= GRID CELL STATES ================= */

.cell.start {

    background: #22c55e !important;

    border-color: #86efac;

    border-radius: 5px;

    box-shadow:
        0 0 10px rgba(34, 197, 94, 0.8),
        0 0 22px rgba(34, 197, 94, 0.35);

    z-index: 3;

}

.cell.end {

    background: #fb4b68 !important;

    border-color: #fda4af;

    border-radius: 5px;

    box-shadow:
        0 0 10px rgba(251, 75, 104, 0.8),
        0 0 22px rgba(251, 75, 104, 0.35);

    z-index: 3;

}

.cell.obstacle {

    background: #17243a !important;

    border-color: #354c68;

    box-shadow: inset 0 0 7px rgba(0, 0, 0, 0.5);

}

.cell.visited {

    background: #38bdf8 !important;

    border-color: #7dd3fc;

    box-shadow: 0 0 7px rgba(56, 189, 248, 0.35);

}

.cell.path {

    background: #facc15 !important;

    border-color: #fde68a;

    box-shadow:
        0 0 9px rgba(250, 204, 21, 0.65);

    z-index: 2;

}

.cell.current {

    background: #c084fc !important;

    box-shadow: 0 0 15px #c084fc;

    z-index: 4;

}


/* ================= COORDINATE LABELS ================= */

.top-labels,
.bottom-labels {

    display: grid;

    grid-template-columns:
        repeat(20, var(--cell-size));

    gap: var(--cell-gap);

    margin: 5px 0;

}

.side-labels {

    display: grid;

    grid-template-rows:
        repeat(20, var(--cell-size));

    gap: var(--cell-gap);

    margin: 0 6px;

}

.label {

    width: var(--cell-size);

    height: var(--cell-size);

    display: flex;

    align-items: center;

    justify-content: center;

    font-family: var(--font-mono);

    font-size: 9px;

    color: #71859e;

    user-select: none;

}


/* ================= LOADING ================= */

.grid-loading {

    position: absolute;

    inset: 0;

    z-index: 10;

    background: rgba(5, 12, 23, 0.9);

    display: flex;

    flex-direction: column;

    align-items: center;

    justify-content: center;

    gap: 15px;

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 10px;

    letter-spacing: 1px;

}

.loading-spinner {

    width: 36px;
    height: 36px;

    border: 3px solid rgba(34, 211, 238, 0.12);

    border-top-color: var(--cyan);

    border-radius: 50%;

    animation: spin 0.8s linear infinite;

}

.hidden {
    display: none !important;
}

.grid-overlay-message {

    position: absolute;

    right: 15px;
    bottom: 12px;

    display: flex;

    align-items: center;

    gap: 7px;

    font-size: 9px;

    color: var(--green-light);

    opacity: 0.6;

    pointer-events: none;

}


/* ================= LEGEND ================= */

.legend-section {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 15px;

    flex-wrap: wrap;

    margin: 18px 0;

    padding: 14px 15px;

    background: rgba(8, 17, 30, 0.55);

    border: 1px solid var(--border);

    border-radius: 12px;

}

.legend-title {

    display: flex;

    align-items: center;

    gap: 8px;

    font-size: 9px;

    font-weight: 800;

    color: var(--text-muted);

    letter-spacing: 1px;

}

.legend-title i {
    color: var(--cyan);
}

.legend {

    display: flex;

    align-items: center;

    gap: 16px;

    flex-wrap: wrap;

}

.legend-item {

    display: flex;

    align-items: center;

    gap: 7px;

    font-size: 9px;

    color: var(--text-secondary);

}

.legend-box {

    width: 11px;
    height: 11px;

    border-radius: 3px;

}

.legend-start {
    background: var(--green);
}

.legend-end {
    background: var(--red);
}

.legend-obstacle {
    background: #354c68;
}

.legend-visited {
    background: #38bdf8;
}

.legend-path {
    background: var(--yellow);
}

.legend-empty {
    background: #dce8f5;
}


/* ================= ACTION TOOLBAR ================= */

.action-toolbar {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 15px;

    flex-wrap: wrap;

    margin-top: 18px;

}

.action-main {

    display: flex;

    align-items: center;

    gap: 10px;

    flex-wrap: wrap;

}

.primary-action-btn {

    min-height: 45px;

    display: flex;

    align-items: center;

    justify-content: center;

    gap: 11px;

    padding: 0 18px;

    border-radius: 11px;

    color: #041522;

    font-size: 11px;

    font-weight: 800;

    background: linear-gradient(
        110deg,
        #22d3ee,
        #60a5fa
    );

    box-shadow:
        0 5px 20px rgba(34, 211, 238, 0.2);

    cursor: pointer;

    transition: 0.3s ease;

}

.primary-action-btn:hover:not(:disabled) {

    transform: translateY(-3px);

    box-shadow:
        0 9px 27px rgba(34, 211, 238, 0.35);

    filter: brightness(1.1);

}

.primary-action-btn:active {
    transform: scale(0.97);
}

.action-arrow {
    transition: transform 0.25s ease;
}

.primary-action-btn:hover .action-arrow {
    transform: translateX(4px);
}

.pause-action-btn,
.step-action-btn {

    min-height: 43px;

    padding: 0 13px;

    display: flex;

    align-items: center;

    gap: 8px;

    border-radius: 10px;

    background: #17283e;

    border: 1px solid var(--border-light);

    color: var(--text-secondary);

    font-size: 10px;

    font-weight: 700;

    cursor: pointer;

    transition: 0.25s;

}

.pause-action-btn:hover:not(:disabled),
.step-action-btn:hover:not(:disabled) {

    color: var(--cyan);

    border-color: var(--cyan);

    background: rgba(34, 211, 238, 0.08);

}

.reset-btn {

    min-height: 43px;

    padding: 0 15px;

    color: #fda4af;

    border-color: rgba(251, 75, 104, 0.2);

    background: rgba(251, 75, 104, 0.06);

}

.reset-btn:hover {

    color: white;

    background: rgba(251, 75, 104, 0.2);

    border-color: var(--red);

}


/* ================= PROGRESS ================= */

.progress-section {

    margin-top: 24px;

    padding-top: 19px;

    border-top: 1px solid var(--border);

}

.progress-header,
.progress-footer {

    display: flex;

    align-items: center;

    justify-content: space-between;

}

.progress-header {

    margin-bottom: 12px;

    color: var(--text-secondary);

    font-size: 10px;

    font-weight: 700;

    letter-spacing: 0.5px;

}

.progress-header > span {

    display: flex;

    align-items: center;

    gap: 8px;

}

.progress-header i {
    color: var(--cyan);
}

.progress-header strong {

    font-family: var(--font-mono);

    color: var(--cyan);

}

.progress-track {

    height: 7px;

    width: 100%;

    overflow: hidden;

    border-radius: 20px;

    background: #1b2b40;

}

.progress-fill {

    width: 0%;

    height: 100%;

    border-radius: inherit;

    background: linear-gradient(
        90deg,
        #0891b2,
        #22d3ee,
        #60a5fa
    );

    box-shadow: 0 0 12px rgba(34, 211, 238, 0.55);

    transition: width 0.2s linear;

}

.progress-footer {

    margin-top: 10px;

    font-size: 9px;

    color: var(--text-muted);

}


/* ================= ANALYTICS ================= */

.analytics-section {

    margin-top: 25px;

    padding: 25px;

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: var(--radius-xl);

    backdrop-filter: blur(20px);

    box-shadow: var(--shadow);

}

.analytics-header {

    display: flex;

    align-items: center;

    justify-content: space-between;

    margin-bottom: 21px;

}

.analytics-header h3 {
    font-size: 20px;
    font-family: var(--font-heading);
}

.analytics-live {

    display: flex;

    align-items: center;

    gap: 8px;

    font-family: var(--font-mono);

    font-size: 9px;

    color: var(--green-light);

}

.analytics-grid {

    display: grid;

    grid-template-columns: repeat(4, 1fr);

    gap: 14px;

}

.analytics-card {

    display: flex;

    align-items: center;

    gap: 13px;

    min-height: 85px;

    padding: 17px;

    background: rgba(7, 15, 27, 0.55);

    border: 1px solid var(--border);

    border-radius: 13px;

    transition: 0.3s;

}

.analytics-card:hover {

    border-color: rgba(34, 211, 238, 0.28);

    transform: translateY(-3px);

}

.analytics-icon {

    width: 38px;
    height: 38px;

    border-radius: 11px;

    display: grid;

    place-items: center;

    font-size: 15px;

    flex-shrink: 0;

}

.cyan-icon {
    background: rgba(34, 211, 238, 0.12);
    color: var(--cyan);
}

.purple-icon {
    background: rgba(167, 139, 250, 0.12);
    color: var(--purple);
}

.orange-icon {
    background: rgba(251, 146, 60, 0.12);
    color: var(--orange);
}

.green-icon {
    background: rgba(34, 197, 94, 0.12);
    color: var(--green);
}

.analytics-info span {

    font-size: 9px;

    color: var(--text-muted);

    font-weight: 700;

    letter-spacing: 0.6px;

}

.analytics-info h3 {

    font-family: var(--font-heading);

    font-size: 22px;

    margin-top: 4px;

}


/* ================= ALGORITHM INFORMATION ================= */

.algorithm-info-section {

    margin-top: 22px;

    padding: 25px;

    border-radius: var(--radius-xl);

    background: linear-gradient(
        115deg,
        rgba(13, 31, 52, 0.95),
        rgba(18, 28, 52, 0.85)
    );

    border: 1px solid rgba(34, 211, 238, 0.16);

    box-shadow: var(--shadow);

}

.algorithm-info-heading {

    display: flex;

    align-items: center;

    justify-content: space-between;

    margin-bottom: 23px;

}

.algorithm-info-heading > i {

    font-size: 25px;

    color: var(--cyan);

    opacity: 0.8;

}

.algorithm-info-content {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 25px;

}

.algorithm-info-main {

    display: flex;

    align-items: center;

    gap: 16px;

}

.algorithm-info-icon {

    width: 53px;
    height: 53px;

    display: grid;

    place-items: center;

    font-size: 22px;

    color: var(--cyan);

    border-radius: 15px;

    background: rgba(34, 211, 238, 0.1);

    border: 1px solid rgba(34, 211, 238, 0.2);

}

.algorithm-info-main span,
.complexity-info span {

    display: block;

    font-size: 9px;

    letter-spacing: 1px;

    color: var(--text-muted);

    font-weight: 700;

}

.algorithm-info-main h4 {

    font-size: 16px;

    margin: 4px 0;

}

.algorithm-info-main p {

    font-size: 11px;

    color: var(--text-secondary);

    max-width: 470px;

    line-height: 1.6;

}

.complexity-info {

    display: flex;

    gap: 28px;

    padding: 15px 20px;

    border: 1px solid var(--border);

    background: rgba(4, 12, 24, 0.35);

    border-radius: 13px;

}

.complexity-info strong {

    display: block;

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 15px;

    margin-top: 5px;

}


/* ================= KEYBOARD SHORTCUTS ================= */

.shortcuts-section {

    display: flex;

    align-items: center;

    gap: 30px;

    padding: 21px 5px;

    flex-wrap: wrap;

}

.shortcuts-heading {

    display: flex;

    align-items: center;

    gap: 9px;

    font-size: 10px;

    color: var(--text-muted);

    font-weight: 800;

    letter-spacing: 1px;

}

.shortcuts-heading i {
    color: var(--cyan);
    font-size: 15px;
}

.shortcuts-list {

    display: flex;

    align-items: center;

    gap: 18px;

    flex-wrap: wrap;

}

.shortcut {

    display: flex;

    align-items: center;

    gap: 7px;

    font-size: 10px;

    color: var(--text-secondary);

}

kbd {

    min-width: 22px;

    padding: 4px 7px;

    text-align: center;

    border-radius: 5px;

    background: #1a2a40;

    border: 1px solid var(--border-light);

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 9px;

}


/* ================= FOOTER ================= */

.main-footer {

    min-height: 65px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 15px;

    padding: 17px 0;

    border-top: 1px solid var(--border);

}

.footer-brand {

    display: flex;

    align-items: center;

    gap: 9px;

    font-family: var(--font-heading);

    font-weight: 800;

    letter-spacing: 1.5px;

    font-size: 12px;

}

.footer-brand i {
    color: var(--cyan);
    font-size: 17px;
}

.main-footer > p {

    font-size: 10px;

    color: var(--text-muted);

}

.footer-right {

    display: flex;

    align-items: center;

    gap: 9px;

    font-family: var(--font-mono);

    font-size: 8px;

    letter-spacing: 0.8px;

    color: var(--text-muted);

}

.footer-right i {
    color: var(--cyan);
}


/* ================= HELP MODAL ================= */

.modal-backdrop {

    position: fixed;

    inset: 0;

    z-index: 1000;

    display: none;

    align-items: center;

    justify-content: center;

    padding: 20px;

    background: rgba(2, 6, 15, 0.82);

    backdrop-filter: blur(12px);

}

.modal-backdrop.show {

    display: flex;

}

.help-modal {

    width: min(480px, 100%);

    padding: 27px;

    border-radius: 22px;

    background: #101d30;

    border: 1px solid rgba(34, 211, 238, 0.23);

    box-shadow: 0 25px 90px rgba(0, 0, 0, 0.55);

}

.modal-header {

    display: flex;

    align-items: center;

    justify-content: space-between;

    margin-bottom: 25px;

}

.modal-header h3 {

    font-family: var(--font-heading);

    font-size: 22px;

    margin-top: 5px;

}

.modal-close {

    width: 35px;
    height: 35px;

    border-radius: 9px;

    background: rgba(255, 255, 255, 0.06);

    color: var(--text-secondary);

    cursor: pointer;

    transition: 0.25s;

}

.modal-close:hover {

    background: rgba(251, 75, 104, 0.15);

    color: var(--red);

}

.help-content {

    display: flex;

    flex-direction: column;

    gap: 19px;

}

.help-step {

    display: flex;

    align-items: flex-start;

    gap: 14px;

}

.help-number {

    width: 33px;
    height: 33px;

    display: grid;

    place-items: center;

    border-radius: 10px;

    background: rgba(34, 211, 238, 0.1);

    color: var(--cyan);

    font-family: var(--font-mono);

    font-size: 11px;

    flex-shrink: 0;

}

.help-step h4 {

    font-size: 12px;

    margin-bottom: 4px;

}

.help-step p {

    font-size: 10px;

    color: var(--text-secondary);

    line-height: 1.7;

}

.modal-primary-btn {

    display: flex;

    align-items: center;

    justify-content: center;

    gap: 10px;

    width: 100%;

    margin-top: 27px;

    padding: 14px;

    background: linear-gradient(
        100deg,
        #0891b2,
        #2563eb
    );

    border-radius: 10px;

    color: white;

    font-size: 12px;

    font-weight: 700;

    cursor: pointer;

    transition: 0.3s;

}

.modal-primary-btn:hover {

    filter: brightness(1.2);

    transform: translateY(-2px);

}


/* ================= TOAST ================= */

.toast-container {

    position: fixed;

    top: 25px;

    right: 25px;

    z-index: 2000;

    width: min(360px, calc(100vw - 35px));

    pointer-events: none;

    opacity: 0;

    visibility: hidden;

    transform: translateX(30px);

    transition: 0.35s ease;

}

.toast-container.show {

    opacity: 1;

    visibility: visible;

    transform: translateX(0);

    pointer-events: auto;

}

.toast {

    display: flex;

    align-items: center;

    gap: 12px;

    padding: 16px;

    border: 1px solid var(--border-light);

    border-radius: 15px;

    background: #142238;

    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);

}

.toast-icon {

    width: 35px;
    height: 35px;

    display: grid;

    place-items: center;

    border-radius: 10px;

    color: var(--cyan);

    background: rgba(34, 211, 238, 0.1);

    flex-shrink: 0;

}

.toast[data-type="success"] .toast-icon {
    color: var(--green);
    background: rgba(34, 197, 94, 0.1);
}

.toast[data-type="error"] .toast-icon {
    color: var(--red);
    background: rgba(251, 75, 104, 0.1);
}

.toast[data-type="warning"] .toast-icon {
    color: var(--orange);
    background: rgba(251, 146, 60, 0.1);
}

.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-content strong {

    font-size: 12px;

    display: block;

}

.toast-content p {

    font-size: 10px;

    color: var(--text-secondary);

    margin-top: 3px;

    line-height: 1.5;

}

.toast-close {

    background: transparent;

    color: var(--text-muted);

    cursor: pointer;

    padding: 5px;

}

.toast-close:hover {
    color: white;
}


/* ================= UTILITY ================= */

.text-cyan {
    color: var(--cyan);
}

.text-green {
    color: var(--green);
}

.text-red {
    color: var(--red);
}

.text-muted {
    color: var(--text-muted);
}

.no-select {
    user-select: none;
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {

        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;

    }

}