/**
 * FSMS Mobile Theme - Dark Navy with Orange Accents
 * Optimized for fast loading and mobile performance
 * Based on modern minimal design principles
 */

/* ==========================================================================
   CSS Variables - Design System
   ========================================================================== */
:root {
    /* Primary Colors */
    --color-navy-dark: #2E3551;
    --color-navy-medium: #374063;
    --color-navy-light: #454C6D;

    /* Accent Colors */
    --color-orange-primary: #FF6839;
    --color-orange-hover: #FF5722;
    --color-orange-light: #FF8A65;

    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E0E0E0;
    --color-gray-300: #BDBDBD;
    --color-gray-400: #9E9E9E;
    --color-gray-500: #757575;
    --color-gray-600: #616161;
    --color-gray-700: #424242;

    /* Text Colors */
    --color-text-primary: #FFFFFF;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.5);
    --color-text-dark: #2E3551;

    /* Background Colors */
    --color-bg-primary: #2E3551;
    --color-bg-secondary: #374063;
    --color-bg-card: rgba(255, 255, 255, 0.05);
    --color-bg-card-hover: rgba(255, 255, 255, 0.08);

    /* Border & Divider Colors */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-divider: rgba(255, 255, 255, 0.05);

    /* Shadow Colors */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);

    /* Spacing Scale */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Monaco", "Inconsolata", "Courier New", monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */
    --text-4xl: 2.25rem;   /* 36px */

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-Index Scale */
    --z-below: -1;
    --z-base: 0;
    --z-dropdown: 10;
    --z-sticky: 100;
    --z-fixed: 1000;
    --z-modal-backdrop: 2000;
    --z-modal: 2001;
    --z-popover: 3000;
    --z-tooltip: 4000;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }

p {
    margin-bottom: var(--space-4);
}

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

/* ==========================================================================
   Layout Components
   ========================================================================== */

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Header */
.mobile-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy-medium) 100%);
    padding: var(--space-4);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.mobile-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-header-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
}

.mobile-header-actions {
    display: flex;
    gap: var(--space-3);
}

/* ==========================================================================
   Card Components
   ========================================================================== */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.card:hover {
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-divider);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}

.card-body {
    color: var(--color-text-secondary);
}

/* Glass Card Effect */
.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   Button Components
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.btn:active {
    transform: scale(0.98);
}

/* Primary Button (Orange) */
.btn-primary {
    background: var(--color-orange-primary);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(255, 104, 57, 0.3);
}

.btn-primary:hover {
    background: var(--color-orange-hover);
    box-shadow: 0 6px 16px rgba(255, 104, 57, 0.4);
}

/* Secondary Button */
.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-orange-primary);
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--color-orange-primary);
    border: 1px solid var(--color-orange-primary);
}

.btn-outline:hover {
    background: var(--color-orange-primary);
    color: var(--color-white);
}

/* Icon Button */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-full);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ==========================================================================
   Input & Form Components
   ========================================================================== */
.input-group {
    margin-bottom: var(--space-4);
}

.input-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
}

.input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--color-orange-primary);
    box-shadow: 0 0 0 3px rgba(255, 104, 57, 0.1);
}

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

/* Search Input */
.search-input {
    padding-left: var(--space-10);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.5)' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: var(--space-3) center;
}

/* ==========================================================================
   List & Item Components
   ========================================================================== */
.list-item {
    display: flex;
    align-items: center;
    padding: var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.list-item:hover {
    background: var(--color-bg-card-hover);
    transform: translateX(4px);
}

.list-item:active {
    transform: scale(0.98);
}

.list-item-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--space-4);
    background: var(--color-orange-primary);
    border-radius: var(--radius-md);
    color: var(--color-white);
    font-size: var(--text-xl);
}

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

.list-item-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.list-item-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.list-item-action {
    flex-shrink: 0;
    margin-left: var(--space-3);
    color: var(--color-text-muted);
}

/* ==========================================================================
   Badge & Chip Components
   ========================================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
    background: var(--color-orange-primary);
    color: var(--color-white);
}

.badge-secondary {
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chip:hover,
.chip.active {
    background: var(--color-orange-primary);
    color: var(--color-white);
    border-color: var(--color-orange-primary);
}

/* ==========================================================================
   Loading & Empty States
   ========================================================================== */
.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-orange-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-4);
    color: var(--color-text-secondary);
}

.empty-state-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
    opacity: 0.3;
}

.empty-state-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-2);
}

.empty-state-message {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Spacing */
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.ml-4 { margin-left: var(--space-4); }
.mr-4 { margin-right: var(--space-4); }
.p-4 { padding: var(--space-4); }

/* Display */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }

/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Border Radius */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Transitions */
.transition { transition: all var(--transition-base); }

/* ==========================================================================
   Mobile Optimizations
   ========================================================================== */

/* Touch feedback */
.touchable {
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.touchable:active {
    opacity: 0.8;
}

/* Hardware acceleration */
.will-change {
    will-change: transform, opacity;
}

/* Safe area support for notched devices */
@supports (padding: max(0px)) {
    body {
        padding-top: max(0px, env(safe-area-inset-top));
        padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-3);
    }

    h1 { font-size: var(--text-2xl); }
    h2 { font-size: var(--text-xl); }
}