/* =============================================================================
   Travel CFO — Design System
   Apple-inspired, Modern Minimalist, Premium Travel
   ============================================================================= */

/* -----------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   ----------------------------------------------------------------------------- */
:root {
    /* Color Palette — "Sunny Playful Travel"
       turquoise sky + sunny yellow + red accent (from the travel poster) */
    --tc-white:        #FFFFFF;
    --tc-bg:           #E7F6FB;   /* soft sky wash canvas */
    --tc-text:         #163A45;   /* deep teal-navy ink */
    --tc-text-secondary: #4A656E;  /* darkened → WCAG AA 4.5:1+ on white */
    --tc-text-tertiary:  #7C9AA3;  /* decorative/placeholder only */
    --tc-card-bg:      #F1FAFC;   /* faint sky tint */
    --tc-border:       #D6EAF0;   /* soft sky border */
    --tc-accent:       #0FA3C4;   /* deep turquoise — links/active */
    --tc-accent-hover: #0B89A6;
    --tc-accent-light: #DAF3F9;
    --tc-sky:          #25BBD8;   /* bright brand turquoise */
    --tc-sun:          #FFC400;   /* sunny yellow — primary action */
    --tc-sun-hover:    #F2B500;
    --tc-sun-ink:      #163A45;   /* dark text on yellow */
    --tc-denim:        #5E8BC9;   /* secondary blue */
    --tc-danger:       #E8332B;   /* poster red */
    --tc-danger-light: #FDEAE9;
    --tc-success:      #2FBF71;
    --tc-success-light:#E4F7EE;
    --tc-warning:      #FF9F0A;
    --tc-warning-light:#FFF6E5;

    /* Typography — rounded & friendly (cute travel) */
    --tc-font: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI',
               Roboto, 'Helvetica Neue', Arial, sans-serif;
    --tc-font-display: 'Fredoka', 'Nunito', -apple-system, BlinkMacSystemFont,
                       'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --tc-font-mono: 'SF Mono', SFMono-Regular, 'Cascadia Code', 'Consolas',
                    'Liberation Mono', Menlo, monospace;

    /* Font Sizes */
    --tc-text-xs:   0.6875rem;  /* 11px */
    --tc-text-sm:   0.8125rem;  /* 13px */
    --tc-text-base: 0.9375rem;  /* 15px */
    --tc-text-md:   1rem;       /* 16px */
    --tc-text-lg:   1.0625rem;  /* 17px */
    --tc-text-xl:   1.1875rem;  /* 19px */
    --tc-text-2xl:  1.375rem;   /* 22px */
    --tc-text-3xl:  1.75rem;    /* 28px */

    /* Font Weights */
    --tc-weight-regular: 400;
    --tc-weight-medium:  500;
    --tc-weight-semibold: 600;
    --tc-weight-bold:    700;

    /* Letter Spacing */
    --tc-tracking-tight:  -0.022em;
    --tc-tracking-normal: 0;
    --tc-tracking-wide:   0.02em;
    --tc-tracking-wider:  0.04em;

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

    /* Borders & Radius — bumped for a rounded, playful look */
    --tc-radius-sm:  10px;
    --tc-radius-md:  14px;
    --tc-radius-lg:  20px;
    --tc-radius-xl:  26px;
    --tc-radius-2xl: 32px;
    --tc-radius-full: 9999px;

    /* Shadows — soft, turquoise-tinted depth */
    --tc-shadow-xs: 0 2px 6px rgba(22, 58, 69, 0.05);
    --tc-shadow-sm: 0 4px 14px rgba(15, 120, 145, 0.08);
    --tc-shadow-md: 0 8px 24px rgba(15, 120, 145, 0.12);
    --tc-shadow-lg: 0 14px 40px rgba(15, 120, 145, 0.16);

    /* Layout */
    --tc-content-max:  480px;
    --tc-header-height: 56px;
    --tc-nav-height:    60px;
    --tc-side-gutter:   var(--tc-space-4);

    /* Transitions */
    --tc-transition-fast: 150ms ease;
    --tc-transition-base: 200ms ease;
    --tc-transition-slow: 300ms ease;

    /* Tap targets */
    --tc-tap-min: 44px;
}

/* -----------------------------------------------------------------------------
   2. Reset & Base
   ----------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    height: 100%;
}

body {
    font-family: var(--tc-font);
    font-size: var(--tc-text-base);
    font-weight: var(--tc-weight-regular);
    line-height: 1.5;
    color: var(--tc-text);
    background-color: var(--tc-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100%;
    /* Tabular figures → money/amounts align and don't jitter on update
       (recommended for finance/budget UIs). */
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}

a {
    color: var(--tc-accent);
    text-decoration: none;
    transition: color var(--tc-transition-fast);
}

a:hover {
    color: var(--tc-accent-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* Remove default list styles where needed */
ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Focus rings — accessibility */
:focus-visible {
    outline: 2px solid var(--tc-accent);
    outline-offset: 2px;
    border-radius: var(--tc-radius-sm);
}

/* -----------------------------------------------------------------------------
   3. Typography
   ----------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--tc-font-display);
    font-weight: var(--tc-weight-semibold);
    letter-spacing: var(--tc-tracking-tight);
    line-height: 1.2;
    color: var(--tc-text);
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.tc-display {
    font-size: var(--tc-text-3xl);
    font-weight: var(--tc-weight-bold);
    letter-spacing: -0.03em;
}

.tc-title {
    font-size: var(--tc-text-2xl);
    font-weight: var(--tc-weight-semibold);
}

.tc-headline {
    font-size: var(--tc-text-xl);
    font-weight: var(--tc-weight-semibold);
}

.tc-body {
    font-size: var(--tc-text-base);
    font-weight: var(--tc-weight-regular);
}

.tc-caption {
    font-size: var(--tc-text-sm);
    color: var(--tc-text-secondary);
}

.tc-overline {
    font-size: var(--tc-text-xs);
    font-weight: var(--tc-weight-semibold);
    letter-spacing: var(--tc-tracking-wider);
    text-transform: uppercase;
    color: var(--tc-text-secondary);
}

/* -----------------------------------------------------------------------------
   4. Layout — Mobile-First, Max 480px on Desktop
   ----------------------------------------------------------------------------- */

/* Authenticated layout body */
.tc-body {
    background: var(--tc-bg);
    /* Extra bottom padding so content never hides behind bottom nav */
    padding-bottom: calc(var(--tc-nav-height) + env(safe-area-inset-bottom, 0px) + 8px);
}

/* Guest layout body */
.tc-guest-body {
    background: var(--tc-bg);
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* ---- Top Header ---- */
.tc-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--tc-white);
    border-bottom: 2px solid var(--tc-sky);
    box-shadow: 0 2px 12px rgba(37, 187, 216, 0.10);
    height: var(--tc-header-height);
    padding-top: env(safe-area-inset-top, 0px);
}

.tc-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--tc-header-height);
    max-width: var(--tc-content-max);
    margin: 0 auto;
    padding: 0 var(--tc-side-gutter);
}

.tc-header-title {
    font-family: var(--tc-font-display);
    font-size: var(--tc-text-xl);
    font-weight: var(--tc-weight-bold);
    color: var(--tc-accent);
    letter-spacing: 0.01em;
}

/* ---- Main Content ---- */
.tc-main {
    flex: 1;
    min-height: 0;
}

.tc-content-wrapper {
    max-width: var(--tc-content-max);
    margin: 0 auto;
    padding: var(--tc-space-4) var(--tc-side-gutter);
}

/* Guest centered layout */
.tc-guest-main {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    min-height: 100dvh;
    padding: var(--tc-space-6) var(--tc-side-gutter);
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* Page-level containers */
.page-container {
    padding-bottom: var(--tc-space-8);
}

.page-header {
    padding-top: var(--tc-space-2);
}

.page-title {
    font-size: var(--tc-text-2xl);
    font-weight: var(--tc-weight-bold);
    letter-spacing: var(--tc-tracking-tight);
    color: var(--tc-text);
    margin-bottom: 0;
}

.section-heading {
    font-size: var(--tc-text-lg);
    font-weight: var(--tc-weight-semibold);
    color: var(--tc-text);
    margin-bottom: var(--tc-space-3);
}

.section-subheading {
    font-size: var(--tc-text-base);
    font-weight: var(--tc-weight-semibold);
    color: var(--tc-text);
}

/* -----------------------------------------------------------------------------
   5. Cards
   ----------------------------------------------------------------------------- */
.tc-card,
.content-card {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-lg);
    box-shadow: var(--tc-shadow-xs);
    overflow: hidden;
}

.tc-card--filled {
    background: var(--tc-card-bg);
    border-color: transparent;
    box-shadow: none;
}

.tc-card--accent {
    background: var(--tc-accent-light);
    border-color: rgba(15, 163, 196, 0.18);
    box-shadow: none;
}

/* Override Bootstrap card defaults to match design system */
.card {
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-lg);
    box-shadow: var(--tc-shadow-xs);
    background: var(--tc-white);
}

.card-body {
    padding: var(--tc-space-4);
}

.card-header {
    background: var(--tc-white);
    border-bottom: 1px solid var(--tc-border);
    padding: var(--tc-space-3) var(--tc-space-4);
    font-weight: var(--tc-weight-semibold);
}

.card-footer {
    background: var(--tc-card-bg);
    border-top: 1px solid var(--tc-border);
    padding: var(--tc-space-3) var(--tc-space-4);
}

/* Trip cards and list items */
.tc-list-card {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-lg);
    padding: var(--tc-space-4);
    margin-bottom: var(--tc-space-3);
    display: block;
    color: var(--tc-text);
    text-decoration: none;
    transition: box-shadow var(--tc-transition-base),
                transform var(--tc-transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.tc-list-card:hover,
.tc-list-card:focus {
    box-shadow: var(--tc-shadow-md);
    color: var(--tc-text);
    transform: translateY(-1px);
}

.tc-list-card:active {
    transform: translateY(0);
    box-shadow: var(--tc-shadow-xs);
}

/* -----------------------------------------------------------------------------
   6. Buttons
   ----------------------------------------------------------------------------- */

/* Base button sizing — ensure 44px+ tap targets */
.btn {
    min-height: var(--tc-tap-min);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--tc-font);
    font-weight: var(--tc-weight-semibold);
    font-size: var(--tc-text-base);
    border-radius: var(--tc-radius-md);
    padding: var(--tc-space-3) var(--tc-space-5);
    transition: background-color var(--tc-transition-fast),
                border-color var(--tc-transition-fast),
                box-shadow var(--tc-transition-fast),
                transform var(--tc-transition-fast);
    -webkit-tap-highlight-color: transparent;
    letter-spacing: -0.01em;
    cursor: pointer;
    text-decoration: none;
    border: none;
    gap: var(--tc-space-2);
}

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

/* Primary — sunny yellow pill with dark ink */
.btn-primary,
.tc-btn-primary {
    background-color: var(--tc-sun) !important;
    border-color: var(--tc-sun) !important;
    color: var(--tc-sun-ink) !important;
    border-radius: var(--tc-radius-full) !important;
    font-weight: var(--tc-weight-bold) !important;
    box-shadow: 0 6px 16px rgba(255, 196, 0, 0.35);
}

.btn-primary:hover,
.btn-primary:focus,
.tc-btn-primary:hover,
.tc-btn-primary:focus {
    background-color: var(--tc-sun-hover) !important;
    border-color: var(--tc-sun-hover) !important;
    color: var(--tc-sun-ink) !important;
    box-shadow: 0 8px 20px rgba(255, 196, 0, 0.42);
}

.tc-btn-primary {
    border: none;
    min-height: var(--tc-tap-min);
    padding: var(--tc-space-3) var(--tc-space-5);
    display: inline-flex;
    align-items: center;
    gap: var(--tc-space-2);
}

/* Secondary */
.btn-secondary {
    background-color: var(--tc-card-bg) !important;
    border-color: var(--tc-border) !important;
    color: var(--tc-text) !important;
}

.btn-secondary:hover {
    background-color: var(--tc-border) !important;
    color: var(--tc-text) !important;
}

/* Danger / outline-danger */
.btn-outline-danger {
    border: 1.5px solid var(--tc-danger) !important;
    color: var(--tc-danger) !important;
    background: transparent !important;
    min-height: var(--tc-tap-min);
}

.btn-outline-danger:hover {
    background-color: var(--tc-danger-light) !important;
}

/* Ghost / outline */
.btn-outline-secondary {
    border: 1.5px solid var(--tc-border) !important;
    color: var(--tc-text) !important;
    background: transparent !important;
    min-height: var(--tc-tap-min);
}

.btn-outline-secondary:hover {
    background-color: var(--tc-card-bg) !important;
    color: var(--tc-text) !important;
}

/* Large size */
.btn-lg {
    font-size: var(--tc-text-md);
    padding: 0.75rem 1.5rem;
    min-height: 52px;
    border-radius: var(--tc-radius-md);
}

/* Small size */
.btn-sm {
    min-height: 36px;
    font-size: var(--tc-text-sm);
    padding: var(--tc-space-1) var(--tc-space-3);
    border-radius: var(--tc-radius-sm);
}

/* Icon button */
.tc-btn-icon {
    width: var(--tc-tap-min);
    height: var(--tc-tap-min);
    padding: 0;
    border-radius: var(--tc-radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--tc-card-bg);
    border: 1px solid var(--tc-border);
    color: var(--tc-text);
    cursor: pointer;
    transition: background var(--tc-transition-fast);
}

.tc-btn-icon:hover {
    background: var(--tc-border);
}

/* -----------------------------------------------------------------------------
   7. Form Controls
   ----------------------------------------------------------------------------- */
.form-label {
    font-size: var(--tc-text-sm);
    font-weight: var(--tc-weight-semibold);
    color: var(--tc-text);
    margin-bottom: var(--tc-space-2);
    display: block;
    letter-spacing: -0.01em;
}

.form-control,
.form-select {
    min-height: var(--tc-tap-min);
    font-family: var(--tc-font);
    font-size: var(--tc-text-base);
    color: var(--tc-text);
    background-color: var(--tc-white);
    border: 1.5px solid var(--tc-border);
    border-radius: var(--tc-radius-md);
    padding: var(--tc-space-3) var(--tc-space-4);
    transition: border-color var(--tc-transition-fast),
                box-shadow var(--tc-transition-fast);
    appearance: none;
    -webkit-appearance: none;
}

.form-control::placeholder {
    color: var(--tc-text-tertiary);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--tc-accent);
    box-shadow: 0 0 0 3px rgba(15, 163, 196, 0.18);
    outline: none;
    background-color: var(--tc-white);
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--tc-danger);
    box-shadow: none;
}

.form-control.is-invalid:focus {
    border-color: var(--tc-danger);
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.15);
}

/* Large form controls */
.form-control-lg {
    min-height: 52px;
    font-size: var(--tc-text-md);
    border-radius: var(--tc-radius-md);
}

.form-select-lg {
    min-height: 52px;
    font-size: var(--tc-text-md);
}

.invalid-feedback {
    font-size: var(--tc-text-sm);
    color: var(--tc-danger);
    margin-top: var(--tc-space-1);
}

.form-text {
    font-size: var(--tc-text-sm);
    color: var(--tc-text-secondary);
    margin-top: var(--tc-space-1);
}

.form-check-input {
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--tc-border);
    border-radius: var(--tc-radius-sm);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--tc-accent);
    border-color: var(--tc-accent);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(15, 163, 196, 0.18);
}

.form-check-label {
    font-size: var(--tc-text-base);
    cursor: pointer;
    padding-left: var(--tc-space-2);
}

/* Textarea */
textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* File input */
input[type="file"].form-control {
    padding: var(--tc-space-2) var(--tc-space-3);
    min-height: var(--tc-tap-min);
    cursor: pointer;
}

/* -----------------------------------------------------------------------------
   8. Bottom Navigation
   ----------------------------------------------------------------------------- */
.tc-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--tc-border);
    padding-bottom: env(safe-area-inset-bottom, 0px);
}

.tc-bottom-nav-inner {
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    max-width: var(--tc-content-max);
    margin: 0 auto;
    height: var(--tc-nav-height);
}

.tc-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--tc-text-secondary);
    text-decoration: none;
    min-width: var(--tc-tap-min);
    min-height: var(--tc-tap-min);
    padding: var(--tc-space-1) 0;
    transition: color var(--tc-transition-fast);
    -webkit-tap-highlight-color: transparent;
    cursor: pointer;
    position: relative;
}

.tc-nav-item:hover,
.tc-nav-item:focus {
    color: var(--tc-accent);
    text-decoration: none;
}

.tc-nav-item:active {
    opacity: 0.7;
}

.tc-nav-item--active {
    color: var(--tc-accent);
    font-weight: var(--tc-weight-bold);
}

.tc-nav-item--active .tc-nav-icon {
    background: var(--tc-accent-light);
    transform: translateY(-1px);
}

.tc-nav-item--active .tc-nav-icon svg {
    stroke-width: 2.4;
}

.tc-nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 30px;
    border-radius: var(--tc-radius-full);
    transition: background var(--tc-transition-base),
                transform var(--tc-transition-fast);
}

.tc-nav-icon svg {
    display: block;
    transition: transform var(--tc-transition-fast);
}

.tc-nav-item:active .tc-nav-icon svg {
    transform: scale(0.92);
}

.tc-nav-label {
    font-size: var(--tc-text-xs);
    font-weight: var(--tc-weight-medium);
    letter-spacing: var(--tc-tracking-wide);
    line-height: 1;
}

/* -----------------------------------------------------------------------------
   9. Flash / Alert Messages
   ----------------------------------------------------------------------------- */
.tc-flash-container {
    position: fixed;
    top: calc(var(--tc-header-height) + env(safe-area-inset-top, 0px) + 8px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    width: calc(100% - var(--tc-space-8));
    max-width: calc(var(--tc-content-max) - var(--tc-space-8));
    pointer-events: none;
}

.tc-alert {
    pointer-events: all;
    border-radius: var(--tc-radius-lg);
    padding: var(--tc-space-3) var(--tc-space-4);
    font-size: var(--tc-text-sm);
    font-weight: var(--tc-weight-medium);
    box-shadow: var(--tc-shadow-lg);
    border: none;
    margin-bottom: var(--tc-space-2);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--tc-space-3);
    animation: tc-alert-in 250ms ease forwards;
}

@keyframes tc-alert-in {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tc-alert--success {
    background: var(--tc-success-light);
    color: #1A7A35;
    border-left: 3px solid var(--tc-success);
}

.tc-alert--error {
    background: var(--tc-danger-light);
    color: #C0392B;
    border-left: 3px solid var(--tc-danger);
}

.tc-alert-icon {
    flex-shrink: 0;
    margin-top: 1px;
}

.alert .btn-close {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    padding: 0;
    opacity: 0.6;
    margin: 0;
}

/* Override Bootstrap alert colors to match design system */
.alert-success {
    background-color: var(--tc-success-light);
    color: #1A7A35;
    border-color: transparent;
}

.alert-danger {
    background-color: var(--tc-danger-light);
    color: #C0392B;
    border-color: transparent;
}

/* -----------------------------------------------------------------------------
   10. Badges & Chips
   ----------------------------------------------------------------------------- */
.badge {
    font-size: var(--tc-text-xs);
    font-weight: var(--tc-weight-semibold);
    letter-spacing: var(--tc-tracking-wide);
    padding: 3px 8px;
    border-radius: var(--tc-radius-full);
}

.badge.bg-primary {
    background-color: var(--tc-accent) !important;
}

.tc-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--tc-text-xs);
    font-weight: var(--tc-weight-semibold);
    letter-spacing: var(--tc-tracking-wide);
    padding: 4px 10px;
    border-radius: var(--tc-radius-full);
    border: none;
}

.tc-badge--accent {
    background: var(--tc-accent-light);
    color: var(--tc-accent);
}

.tc-badge--success {
    background: var(--tc-success-light);
    color: #1A7A35;
}

.tc-badge--warning {
    background: var(--tc-warning-light);
    color: #8A5200;
}

.tc-badge--neutral {
    background: var(--tc-card-bg);
    color: var(--tc-text-secondary);
}

/* Feature chips (used in placeholders) */
.tc-feature-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--tc-space-1);
    font-size: var(--tc-text-sm);
    color: var(--tc-text-secondary);
    background: var(--tc-card-bg);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-full);
    padding: var(--tc-space-1) var(--tc-space-3);
    margin: var(--tc-space-1);
}

/* -----------------------------------------------------------------------------
   11. Empty States
   ----------------------------------------------------------------------------- */
.tc-empty-state {
    text-align: center;
    padding: var(--tc-space-12) var(--tc-space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tc-empty-state__icon {
    width: 88px;
    height: 88px;
    background: var(--tc-accent-light);
    border-radius: var(--tc-radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--tc-space-5);
}

.tc-empty-state__heading {
    font-size: var(--tc-text-2xl);
    font-weight: var(--tc-weight-bold);
    color: var(--tc-text);
    margin-bottom: var(--tc-space-3);
    letter-spacing: var(--tc-tracking-tight);
}

.tc-empty-state__body {
    font-size: var(--tc-text-base);
    color: var(--tc-text-secondary);
    line-height: 1.6;
    max-width: 300px;
    margin-bottom: var(--tc-space-5);
}

.tc-empty-state__features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    max-width: 340px;
    margin-bottom: var(--tc-space-4);
}

/* -----------------------------------------------------------------------------
   12. Auth Layout
   ----------------------------------------------------------------------------- */
.auth-container {
    width: 100%;
    max-width: 400px;
    padding: var(--tc-space-4) 0;
}

.auth-brand {
    margin-bottom: var(--tc-space-6);
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--tc-space-3);
}

.auth-title {
    font-size: var(--tc-text-2xl);
    font-weight: var(--tc-weight-bold);
    color: var(--tc-text);
    letter-spacing: var(--tc-tracking-tight);
    margin-bottom: var(--tc-space-1);
}

.auth-subtitle {
    font-size: var(--tc-text-base);
    color: var(--tc-text-secondary);
    margin-bottom: 0;
}

.auth-card {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-xl);
    padding: var(--tc-space-6);
    box-shadow: var(--tc-shadow-sm);
}

.auth-card-heading {
    font-size: var(--tc-text-xl);
    font-weight: var(--tc-weight-semibold);
    color: var(--tc-text);
    margin-bottom: var(--tc-space-5);
    letter-spacing: var(--tc-tracking-tight);
}

.auth-btn {
    width: 100%;
    min-height: 52px;
}

.auth-footer-text {
    font-size: var(--tc-text-sm);
    color: var(--tc-text-secondary);
    margin-bottom: 0;
}

.auth-link {
    color: var(--tc-accent);
    font-weight: var(--tc-weight-medium);
}

.auth-link:hover {
    color: var(--tc-accent-hover);
}

/* -----------------------------------------------------------------------------
   13. Profile
   ----------------------------------------------------------------------------- */
.avatar-img {
    width: 88px !important;
    height: 88px !important;     /* beats global img{height:auto} → perfect circle */
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 50% !important;
    border: 3px solid var(--tc-sky);
    box-shadow: 0 4px 14px rgba(37, 187, 216, 0.25);
    display: block;
    margin: 0 auto;
}

.avatar-placeholder {
    width: 88px;
    height: 88px;
    aspect-ratio: 1 / 1;
    border-radius: 50% !important;
    background: var(--tc-accent-light);
    border: 3px solid var(--tc-sky);
    box-shadow: 0 4px 14px rgba(37, 187, 216, 0.25);
}

.profile-name {
    font-size: var(--tc-text-xl);
    font-weight: var(--tc-weight-semibold);
    color: var(--tc-text);
    letter-spacing: var(--tc-tracking-tight);
}

/* -----------------------------------------------------------------------------
   14. Dividers & Separators
   ----------------------------------------------------------------------------- */
hr {
    border: none;
    border-top: 1px solid var(--tc-border);
    margin: var(--tc-space-4) 0;
}

.tc-divider {
    height: 1px;
    background: var(--tc-border);
    margin: var(--tc-space-4) 0;
}

/* -----------------------------------------------------------------------------
   15. List groups / stacked items
   ----------------------------------------------------------------------------- */
.tc-list {
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-lg);
    overflow: hidden;
}

.tc-list-item {
    display: flex;
    align-items: center;
    gap: var(--tc-space-3);
    padding: var(--tc-space-3) var(--tc-space-4);
    background: var(--tc-white);
    border-bottom: 1px solid var(--tc-border);
    min-height: var(--tc-tap-min);
    transition: background var(--tc-transition-fast);
    text-decoration: none;
    color: var(--tc-text);
}

.tc-list-item:last-child {
    border-bottom: none;
}

.tc-list-item:hover {
    background: var(--tc-card-bg);
    color: var(--tc-text);
}

/* -----------------------------------------------------------------------------
   16. Spacing Utilities
   ----------------------------------------------------------------------------- */
.gap-xs  { gap: var(--tc-space-1); }
.gap-sm  { gap: var(--tc-space-2); }
.gap-md  { gap: var(--tc-space-4); }
.gap-lg  { gap: var(--tc-space-6); }

.mt-section { margin-top: var(--tc-space-6); }
.mb-section { margin-bottom: var(--tc-space-6); }

/* -----------------------------------------------------------------------------
   17. Skeleton / Loading
   ----------------------------------------------------------------------------- */
.tc-skeleton {
    background: var(--tc-card-bg);
    border-radius: var(--tc-radius-sm);
    animation: tc-shimmer 1.5s ease-in-out infinite;
}

@keyframes tc-shimmer {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* -----------------------------------------------------------------------------
   18. Responsive — Center content on wider screens
   ----------------------------------------------------------------------------- */
@media (min-width: 540px) {
    .tc-content-wrapper {
        padding-left: var(--tc-space-6);
        padding-right: var(--tc-space-6);
    }

    .tc-header-inner {
        padding-left: var(--tc-space-6);
        padding-right: var(--tc-space-6);
    }

    /* Add subtle side gutters on larger screens */
    body {
        background: #C7E9F2;
    }

    .tc-header {
        background: var(--tc-white);
    }

    .tc-main {
        padding-top: var(--tc-space-2);
    }

    .tc-content-wrapper {
        background: var(--tc-white);
        min-height: calc(100dvh - var(--tc-header-height) - var(--tc-nav-height));
        border-left: 1px solid var(--tc-border);
        border-right: 1px solid var(--tc-border);
    }

    .tc-bottom-nav {
        border-left: 1px solid var(--tc-border);
        border-right: 1px solid var(--tc-border);
    }
}

@media (min-width: 768px) {
    .tc-content-wrapper {
        border-radius: 0;
    }
}

/* Guest on larger screens */
@media (min-width: 540px) {
    .tc-guest-body {
        background: #C7E9F2;
    }

    .tc-guest-main {
        padding-top: var(--tc-space-12);
    }

    .auth-card {
        box-shadow: var(--tc-shadow-md);
    }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* -----------------------------------------------------------------------------
   19. Bootstrap overrides — miscellaneous
   ----------------------------------------------------------------------------- */
.text-secondary {
    color: var(--tc-text-secondary) !important;
}

.text-primary {
    color: var(--tc-accent) !important;
}

.bg-primary {
    background-color: var(--tc-accent) !important;
}

.border {
    border-color: var(--tc-border) !important;
}

/* Ensure consistent border radius on Bootstrap components */
.rounded {
    border-radius: var(--tc-radius-md) !important;
}

.rounded-lg {
    border-radius: var(--tc-radius-lg) !important;
}

/* Input group */
.input-group .form-control {
    border-radius: var(--tc-radius-md) !important;
}

.input-group .btn {
    border-radius: var(--tc-radius-md) !important;
}

/* Dropdown */
.dropdown-menu {
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius-lg);
    box-shadow: var(--tc-shadow-md);
    padding: var(--tc-space-2);
}

.dropdown-item {
    border-radius: var(--tc-radius-sm);
    padding: var(--tc-space-2) var(--tc-space-3);
    font-size: var(--tc-text-base);
    min-height: var(--tc-tap-min);
    display: flex;
    align-items: center;
}

.dropdown-item:hover {
    background: var(--tc-card-bg);
}

/* Modal */
.modal-content {
    border-radius: var(--tc-radius-xl);
    border: 1px solid var(--tc-border);
    box-shadow: var(--tc-shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--tc-border);
    padding: var(--tc-space-4) var(--tc-space-5);
}

.modal-footer {
    border-top: 1px solid var(--tc-border);
    padding: var(--tc-space-4) var(--tc-space-5);
}