/* ============================================
   ROOT VARIABLES - OPTIMIZED CONTRAST
   ============================================ */
:root {
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    
    /* Light Mode - High Contrast */
    --bg-body: #f0f2f5;
    --bg-white: #ffffff;
    --bg-light: #f5f6f8;
    --bg-dark: #1e1e2f;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #7a7a9a;
    --border-color: #dde0e5;
    --card-bg: #ffffff;
    --card-border: #dde0e5;
    --input-bg: #ffffff;
    --chip-bg: #f5f6f8;
    --chip-hover: #e8eaed;
    --badge-bg: #1e1e2f;
    --badge-text: #ffffff;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.10);
}

/* Dark Mode - Optimized Contrast */
[data-bs-theme="dark"] {
    --bg-body: #101012;                        /* Anodized carbon background */
    --bg-white: #202024;                       /* Extruded iron casing layer */
    --bg-light: #303037;                       
    --bg-dark: #f5f5f7;                        
    --text-primary: #f5f5f7;                   
    --text-secondary: #caccce;                 
    --text-muted: #88898c;                     
    --border-color: #303037;                   
    --card-bg: #202024;                        
    --card-border: rgba(245, 245, 247, 0.12);  
    --input-bg: #101012;                       
    --chip-bg: #303037;                        
    --chip-hover: #40404a;                     
    --badge-bg: #f5f5f7;                       
    --badge-text: #101012;                     
    --shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.6);
    --shadow-hover: 0 20px 45px rgba(245, 245, 247, 0.06);
}

[data-bs-theme="ocean"] {
    --bg-body: #eef7f9;                        /* Sea-glass background */
    --bg-white: #ffffff;                       /* Foam white surfaces */
    --bg-light: #e1f1f4;
    --bg-dark: #073b4c;
    --text-primary: #0b3d4a;
    --text-secondary: #3d6b78;
    --text-muted: #7fa3ac;
    --border-color: #cfe8ec;
    --card-bg: #ffffff;
    --card-border: #cfe8ec;
    --input-bg: #ffffff;
    --chip-bg: #e1f1f4;
    --chip-hover: #d0e9ee;
    --badge-bg: #0891b2;
    --badge-text: #ffffff;
    --shadow: 0 2px 8px rgba(8, 66, 79, 0.08);
    --shadow-hover: 0 4px 20px rgba(8, 66, 79, 0.14);
}

[data-bs-theme="sunset"] {
    --bg-body: #fdf3ec;                        /* Warm dusk background */
    --bg-white: #fffaf5;                       /* Sunlit card surfaces */
    --bg-light: #fce8db;
    --bg-dark: #7c2d12;
    --text-primary: #431407;
    --text-secondary: #9a4a26;
    --text-muted: #c08a68;
    --border-color: #f3d9c5;
    --card-bg: #fffaf5;
    --card-border: #f3d9c5;
    --input-bg: #fffaf5;
    --chip-bg: #fce8db;
    --chip-hover: #f8dcc7;
    --badge-bg: #ea580c;
    --badge-text: #ffffff;
    --shadow: 0 2px 8px rgba(124, 45, 18, 0.08);
    --shadow-hover: 0 4px 20px rgba(124, 45, 18, 0.14);
}

[data-bs-theme="forest"] {
    --bg-body: #f1f5ee;                        /* Moss-tinted background */
    --bg-white: #fbfdf9;                       /* Canopy-light surfaces */
    --bg-light: #e3ecdd;
    --bg-dark: #1e3a24;
    --text-primary: #1a2e1c;
    --text-secondary: #4b6b4e;
    --text-muted: #85a288;
    --border-color: #d7e4d1;
    --card-bg: #fbfdf9;
    --card-border: #d7e4d1;
    --input-bg: #fbfdf9;
    --chip-bg: #e3ecdd;
    --chip-hover: #d4e2cc;
    --badge-bg: #16803e;
    --badge-text: #ffffff;
    --shadow: 0 2px 8px rgba(26, 46, 28, 0.08);
    --shadow-hover: 0 4px 20px rgba(26, 46, 28, 0.14);
}

/* ============================================
   SKIN DROPDOWN
   ============================================ */
.skin-dropdown-menu {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-hover);
}

.skin-dropdown-menu .dropdown-item {
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 0.9rem;
}

.skin-dropdown-menu .dropdown-item:hover,
.skin-dropdown-menu .dropdown-item:focus {
    background: var(--chip-bg);
    color: var(--text-primary);
}

.skin-dropdown-menu .dropdown-item.active {
    background: var(--chip-bg);
    color: #6366f1;
    font-weight: 600;
}

.skin-toggle-btn {
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
}

.skin-toggle-btn:hover {
    border-color: var(--text-primary) !important;
    color: var(--text-primary) !important;
}

.logo {
    transition: filter .9s ease;
}

[data-bs-theme="dark"] .logo {
    filter: brightness(0) invert(1);
}

/* ============================================
   BASE STYLES
   ============================================ */
html {
    font-size: 15px;
}

html, body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-body);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

/* Container - Slim and centered */
.container {
    max-width: 940px !important;
}

@media (max-width: 991.98px) {
    .container {
        max-width: 100% !important;
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    background: var(--bg-white) !important;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    padding: 0.65rem 0;
}

.navbar-brand {
    color: var(--text-primary) !important;
    font-size: 1.05rem;
    font-weight: 700;
}

.navbar-brand .bg-dark {
    background: var(--badge-bg) !important;
    color: var(--badge-text) !important;
}

.nav-link {
    color: var(--text-secondary) !important;
    transition: color 0.3s ease;
    font-size: 0.85rem;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--text-primary) !important;
}

.nav-link.active {
    color: var(--text-primary) !important;
    font-weight: 600;
}

.theme-toggle {
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--text-primary) !important;
    color: var(--text-primary) !important;
}

/* ============================================
   BENTO GRID & CARDS
   ============================================ */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1rem;
}

.bento-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
    position: relative;
}

.bento-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* Bento Sizing */
.col-bento-4 { grid-column: span 4; }
.col-bento-5 { grid-column: span 5; }
.col-bento-6 { grid-column: span 6; }
.col-bento-7 { grid-column: span 7; }
.col-bento-8 { grid-column: span 8; }
.col-bento-12 { grid-column: span 12; }

@media (max-width: 991.98px) {
    .bento-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    .col-bento-4, .col-bento-5, .col-bento-6, .col-bento-7, .col-bento-8 {
        grid-column: span 1;
    }
}

/* ============================================
   BRAND BADGE
   ============================================ */
.brand-badge {
    display: inline-block;
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 3px 12px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   TEXT COLORS
   ============================================ */
.text-secondary {
    color: var(--text-secondary) !important;
}

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

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

.text-neon-gradient {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-label-premium {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.3s ease;
}

.form-select-saas,
.form-control-saas {
    background: var(--input-bg) !important;
    border: 1.5px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-sm) !important;
    padding: 0.5rem 0.75rem !important;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    width: 100%;
}

.form-select-saas:focus,
.form-control-saas:focus {
    border-color: #6366f1 !important;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15) !important;
    outline: none;
}

[data-bs-theme="dark"] .form-select-saas:focus,
[data-bs-theme="dark"] .form-control-saas:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2) !important;
}

/* ============================================
   SUBJECT CHIPS
   ============================================ */
.subject-chip-saas {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--chip-bg);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
    position: relative;
}

.subject-chip-saas:hover {
    border-color: #6366f1;
    transform: translateX(3px);
}

.subject-chip-saas .subject-checkbox {
    display: none;
}

.subject-chip-saas .chip-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-secondary);
    font-size: 0.65rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.subject-chip-saas .chip-text {
    flex: 1;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
}

.subject-chip-saas .chip-checkmark {
    display: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #6366f1;
    color: white;
    font-size: 0.6rem;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* Selected state */
.subject-chip-saas.selected {
    border-color: #6366f1;
    background: rgba(99, 102, 241, 0.08);
}

[data-bs-theme="dark"] .subject-chip-saas.selected {
    background: rgba(99, 102, 241, 0.15);
}

.subject-chip-saas.selected .chip-checkmark {
    display: inline-flex;
}

.subject-chip-saas.selected .chip-number {
    background: #6366f1;
    color: white;
}

.subject-count-badge {
    display: inline-block;
    background: #6366f1;
    color: white;
    padding: 0.1rem 0.6rem;
    border-radius: 100px;
    font-size: 0.65rem;
    font-weight: 600;
}

/* ============================================
   CONFIDENCE CHIPS
   ============================================ */
.confidence-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    background: var(--chip-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.confidence-chip .chip-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #6366f1;
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    flex-shrink: 0;
}

.confidence-chip .chip-label {
    flex: 1;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.confidence-chip .confidence-select {
    background: transparent !important;
    border: none !important;
    color: var(--text-primary) !important;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.15rem 0.3rem;
    cursor: pointer;
    max-width: 130px;
}

.confidence-chip .confidence-select:focus {
    outline: none;
    box-shadow: none;
}

.confidence-chip .confidence-select option {
    background: var(--bg-body);
    color: var(--text-primary);
}

/* ============================================
   WIZARD STEPS
   ============================================ */
.wizard-step-container {
    min-height: 300px;
    position: relative;
    overflow: hidden;
}

.wizard-step {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease;
    transform: translateX(15px);
    padding: 0.15rem 0;
}

.wizard-step.active {
    opacity: 1;
    visibility: visible;
    position: relative;
    transform: translateX(0);
}

.wizard-step.exit {
    opacity: 0;
    transform: translateX(-15px);
}

@media (max-width: 576px) {
    .wizard-step-container {
        min-height: 380px;
    }
}

@media (min-width: 577px) and (max-width: 768px) {
    .wizard-step-container {
        min-height: 330px;
    }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-saas-glow {
    background: var(--badge-bg);
    color: var(--badge-text) !important;
    font-weight: 600;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-size: 0.85rem;
}

.btn-saas-glow:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    color: var(--badge-text) !important;
}

[data-bs-theme="dark"] .btn-saas-glow:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-outline-saas {
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-size: 0.85rem;
}

.btn-outline-saas:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    background: var(--chip-bg);
}

/* ============================================
   MOCKUP / VISUAL ELEMENTS
   ============================================ */
.visual-mockup {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--chip-bg);
    overflow: hidden;
}

.mockup-header {
    background: var(--chip-bg);
    padding: 0.4rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.dot.bg-success {
    background-color: #22c55e;
}

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress {
    background: var(--border-color);
    border-radius: 100px;
    overflow: hidden;
    transition: background-color 0.3s ease;
    height: 6px;
}

.progress .progress-bar {
    background: var(--badge-bg);
    border-radius: 100px;
    transition: width 0.4s ease;
}

/* ============================================
   BADGES
   ============================================ */
.badge.bg-dark {
    background: var(--badge-bg) !important;
    color: var(--badge-text) !important;
    font-weight: 500;
}

.badge.bg-light {
    background: var(--chip-bg) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color);
    font-weight: 500;
}

/* ============================================
   BG UTILITIES
   ============================================ */
.bg-white {
    background: var(--bg-white) !important;
}

.bg-light {
    background: var(--chip-bg) !important;
}

.bg-dark {
    background: var(--badge-bg) !important;
    color: var(--badge-text) !important;
}

.bg-body {
    background: var(--bg-body) !important;
}

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

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

/* ============================================
   FAQ ACCORDION
   ============================================ */
.accordion-item {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-sm) !important;
    margin-bottom: 0.5rem;
    overflow: hidden;
    background: var(--card-bg) !important;
}

.accordion-button {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--card-bg) !important;
    font-size: 0.85rem;
    padding: 0.75rem 1rem;
}

.accordion-button:not(.collapsed) {
    background: var(--chip-bg) !important;
    color: var(--text-primary);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--border-color);
}

.accordion-body {
    color: var(--text-secondary);
    background: var(--card-bg);
    font-size: 0.85rem;
    padding: 1rem;
}

/* ============================================
   FEATURE CARDS
   ============================================ */
.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    transition: all 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    background: var(--bg-white) !important;
    border-top: 1px solid var(--border-color) !important;
    transition: background-color 0.3s ease;
}

footer .text-secondary {
    color: var(--text-secondary) !important;
}

/* ============================================
   CTA SECTION
   ============================================ */
.bg-dark.text-white {
    background: var(--badge-bg) !important;
    color: var(--badge-text) !important;
}

.bg-dark.text-white .text-white-50 {
    color: var(--text-secondary) !important;
}

.btn-light {
    background: var(--bg-body) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color);
}

.btn-light:hover {
    background: var(--chip-bg) !important;
    color: var(--text-primary) !important;
}

/* ============================================
   PLAN DETAILS PAGE
   ============================================ */
#planStudyDaysBadges .badge {
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.2rem 0.6rem;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-bg-overlay {
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
}

/* ============================================
   RESPONSIVE HELPERS
   ============================================ */
@media (max-width: 576px) {
    html {
        font-size: 13px;
    }
    
    .bento-item {
        padding: 1rem;
    }
    
    .btn-saas-glow {
        padding: 0.5rem 1.2rem;
        font-size: 0.8rem;
    }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 100px;
}

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

/* ============================================
   SELECTION COLOR
   ============================================ */
::selection {
    background: rgba(99, 102, 241, 0.25);
    color: var(--text-primary);
}

/* ============================================
   CUSTOM TOGGLE SWITCH - THEMED
   ============================================ */
.form-check-input[type="checkbox"] {
    background-color: var(--border-color);
    border-color: var(--border-color);
    background-image: none;
    position: relative;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.form-check-input[type="checkbox"]:checked {
    background-color: #6366f1;
    border-color: #6366f1;
}

.form-check-input[type="checkbox"]:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    border-color: #6366f1;
}

/* Toggle thumb styling */
.form-check-input[type="checkbox"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23ffffff'/%3e%3c/svg%3e") !important;
    background-position: left center;
    background-repeat: no-repeat;
    background-size: contain;
}

.form-check-input[type="checkbox"]:checked {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23ffffff'/%3e%3c/svg%3e") !important;
    background-position: right center;
}

/* Dark mode toggle */
[data-bs-theme="dark"] .form-check-input[type="checkbox"] {
    background-color: #40404a;
    border-color: #40404a;
}

[data-bs-theme="dark"] .form-check-input[type="checkbox"]:checked {
    background-color: #818cf8;
    border-color: #818cf8;
}

/* Ocean theme toggle */
[data-bs-theme="ocean"] .form-check-input[type="checkbox"]:checked {
    background-color: #0891b2;
    border-color: #0891b2;
}

/* Sunset theme toggle */
[data-bs-theme="sunset"] .form-check-input[type="checkbox"]:checked {
    background-color: #ea580c;
    border-color: #ea580c;
}

/* Forest theme toggle */
[data-bs-theme="forest"] .form-check-input[type="checkbox"]:checked {
    background-color: #16803e;
    border-color: #16803e;
}

/* Dropdown item hover for reminder toggle */
.dropdown-item .form-check-input {
    transition: all 0.2s ease;
}

.dropdown-item:hover .form-check-input {
    transform: scale(1.05);
}

/* Mobile nav link styling for reminder */
.nav-item .nav-link .form-check-input {
    transition: all 0.2s ease;
}

.nav-item .nav-link:hover .form-check-input {
    transform: scale(1.05);
}