/* ===== CSS Variables (Design System) ===== */
:root {
    /* Colors */
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;

    --color-accent-cyan: #06b6d4;
    --color-accent-purple: #8b5cf6;
    --color-accent-pink: #ec4899;

    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4);
    --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.3);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated background gradient */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Glassmorphism Panel ===== */
.glass-panel {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(203, 213, 225, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
}

.glass-panel:hover {
    border-color: rgba(6, 182, 212, 0.3);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* ===== Header ===== */
.header {
    position: relative;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-2xl);
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.logo svg {
    filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.5));
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.logo h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-left: 48px;
}

.home-btn {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(6, 182, 212, 0.15);
    color: var(--color-accent-cyan);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
}

.home-btn:hover {
    background: rgba(6, 182, 212, 0.25);
    border-color: var(--color-accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.home-btn svg {
    width: 20px;
    height: 20px;
}


/* ===== Input Section ===== */
.input-section {
    margin-bottom: var(--spacing-2xl);
}

.input-section h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.input-group input,
.routing-options select {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(203, 213, 225, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    outline: none;
}

.input-group input:focus,
.routing-options select:focus {
    border-color: var(--color-accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

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

.routing-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.routing-options label {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.routing-options select {
    flex: 1;
    max-width: 300px;
    cursor: pointer;
}

/* ===== Map Click Mode ===== */
.map-click-mode {
    margin-bottom: var(--spacing-lg);
}

.mode-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.mode-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    background: rgba(15, 23, 42, 0.6);
    color: var(--color-text-secondary);
    border: 1px solid rgba(203, 213, 225, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.mode-btn:hover {
    border-color: var(--color-accent-cyan);
    background: rgba(6, 182, 212, 0.1);
    color: var(--color-text-primary);
}

.mode-btn.active {
    background: rgba(6, 182, 212, 0.2);
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.mode-btn svg {
    width: 16px;
    height: 16px;
}

.mode-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(6, 182, 212, 0.1);
    border-left: 3px solid var(--color-accent-cyan);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    animation: fadeInUp 0.3s ease-out;
}

.mode-hint svg {
    color: var(--color-accent-cyan);
    flex-shrink: 0;
}

/* Map cursor for click mode */
#map.click-mode {
    cursor: crosshair;
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 300px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(6, 182, 212, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===== Content Grid ===== */
.main-content {
    position: relative;
    z-index: 1;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

/* ===== Map Section ===== */
.map-section {
    position: relative;
    height: 600px;
    overflow: hidden;
}

#map {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    border-radius: var(--radius-lg);
    z-index: 1000;
}

.loading-overlay.hidden {
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(6, 182, 212, 0.2);
    border-top-color: var(--color-accent-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
}

/* ===== Navigation Panel ===== */
.navigation-panel {
    height: 600px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent-cyan) rgba(30, 41, 59, 0.5);
}

.navigation-panel::-webkit-scrollbar {
    width: 8px;
}

.navigation-panel::-webkit-scrollbar-track {
    background: rgba(30, 41, 59, 0.5);
    border-radius: var(--radius-md);
}

.navigation-panel::-webkit-scrollbar-thumb {
    background: var(--color-accent-cyan);
    border-radius: var(--radius-md);
}

.trip-summary {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(203, 213, 225, 0.1);
}

.trip-summary h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.summary-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(6, 182, 212, 0.1);
    border-left: 3px solid var(--color-accent-cyan);
    border-radius: var(--radius-md);
}

.stat-item svg {
    color: var(--color-accent-cyan);
    flex-shrink: 0;
}

.stat-item div {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent-cyan);
}

/* ===== Navigation Instructions ===== */
.navigation-instructions h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.instructions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.instruction-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(15, 23, 42, 0.5);
    border-radius: var(--radius-md);
    border-left: 3px solid transparent;
    transition: all var(--transition-base);
    animation: fadeInUp 0.3s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.instruction-item:hover {
    background: rgba(15, 23, 42, 0.8);
    border-left-color: var(--color-accent-cyan);
}

.instruction-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.instruction-content {
    flex: 1;
}

.instruction-text {
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.instruction-distance {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ===== No Route State ===== */
.no-route {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    gap: var(--spacing-lg);
    color: var(--color-text-muted);
}

.no-route svg {
    opacity: 0.2;
}

.no-route p {
    font-size: var(--font-size-lg);
}

.hidden {
    display: none !important;
}

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(12px);
    color: var(--color-text-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(203, 213, 225, 0.2);
    z-index: 10000;
    animation: slideInRight 0.3s ease-out;
    max-width: 400px;
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-error);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .navigation-panel {
        height: auto;
    }
}

@media (max-width: 768px) {
    .input-grid {
        grid-template-columns: 1fr;
    }

    .logo h1 {
        font-size: var(--font-size-2xl);
    }

    .btn-primary {
        max-width: none;
    }

    .map-section {
        height: 400px;
    }

    .toast {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
    }
}