/* ================================================================== */
/* === THEME VARIABLES (LIQUID GLASS STYLE)                       === */
/* ================================================================== */
:root {
    /* Light Theme: iOS-inspired liquid glass with dark text/elements */
    --primary-color: #007aff; /* Blue for accents */
    --primary-color-darker: #005bb5;
    --primary-gradient: linear-gradient(45deg, #007aff, #005bb5);
    --success-color: #34c759; /* Bright Green */
    --success-background: rgba(52, 199, 89, 0.15);
    --danger-color: #ff3b30; /* Bright Red */
    --danger-background: rgba(255, 59, 48, 0.15);
    --background-color: #f2f2f7; /* Light gray page background */
    --surface-background: rgba(255, 255, 255, 0.7); /* Translucent glassy surface */
    --input-background: rgba(239, 239, 244, 0.7); /* Slightly opaque input */
    --text-color: #333333; /* Dark gray text */
    --heading-color: #000000; /* AMOLED black headings */
    --border-color: rgba(0, 0, 0, 0.15); /* Soft black border */
    --shadow-color: rgba(0, 0, 0, 0.1); /* Black shadow for depth */
    --shadow-hover-color: rgba(0, 0, 0, 0.15);
    --glass-blur: blur(20px);
    --glass-border: 1px solid rgba(0, 0, 0, 0.08);
    --glass-gradient: linear-gradient(rgba(255,255,255,0.2), rgba(255,255,255,0.1));
}

/* ================================================================== */
/* === AMOLED DARK THEME OVERRIDE (LIQUID GLASS MONOCHROME)       === */
/* ================================================================== */
body.dark-theme {
    /* --- Core Palette --- */
    --primary-color: #FFFFFF; /* White for all accents */
    --primary-color-darker: #cccccc;
    --primary-gradient: linear-gradient(45deg, #FFFFFF, #b0b0b0);
    --success-color: #30d158; /* Neon Green */
    --success-background: rgba(48, 209, 88, 0.15);
    --danger-color: #ff453a; /* Neon Red */
    --danger-background: rgba(255, 69, 58, 0.15);
    --background-color: #000000; /* Pure AMOLED Black */
    --surface-background: rgba(28, 28, 30, 0.75); /* Translucent dark gray surface */
    --input-background: rgba(44, 44, 46, 0.7); /* Slightly opaque input */
    --text-color: #EAEAEA; /* Off-white for readability */
    --heading-color: #FFFFFF; /* Pure white for max contrast */
    --border-color: rgba(255, 255, 255, 0.15); /* Soft white border */
    /* --- Glowing Shadow Effects --- */
    --shadow-color: rgba(255, 255, 255, 0.08); /* White Glow */
    --shadow-hover-color: rgba(255, 255, 255, 0.15); /* Intense White Glow */
    --glass-blur: blur(20px);
    --glass-border: 1px solid rgba(255, 255, 255, 0.08);
    --glass-gradient: linear-gradient(rgba(0,0,0,0.2), rgba(0,0,0,0.1));
}

/* ========================================= */
/* === GLOBAL & TYPOGRAPHY STYLES        === */
/* ========================================= */
body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Poppins', sans-serif;
    margin: 0;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    font-weight: 700;
    line-height: 1.3;
}

h1 { font-size: 2.8rem; margin-bottom: 1rem; }
h2 { font-size: 2.2rem; margin-bottom: 1rem; }

/* Gradient text for dark theme headings */
body.dark-theme h1, body.dark-theme h2 {
    background-image: var(--primary-gradient);
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-color-darker);
}

/* ========================================= */
/* === LAYOUT & CARDS (LIQUID GLASS)     === */
/* ========================================= */
/* Shared styles for all glass containers */
.card, .form-container, .list-item, .feature-card, .profile-container, .admin-card, .quiz-container, .modal-content {
    background-color: var(--surface-background);
    background-image: var(--glass-gradient);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 8px 30px var(--shadow-color);
    padding: 30px;
    margin-bottom: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Hover effects for standard cards */
.card:hover, .form-container:hover, .feature-card:hover, .profile-container:hover, .admin-card:hover, .quiz-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px var(--shadow-hover-color);
}

/* 
   === FIX FOR LIST ITEM & DROPDOWNS === 
   Specific overrides for .list-item to ensure dropdowns appear on top 
*/
.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative; /* Essential for z-index context */
    z-index: 1; /* Base z-index */
    overflow: visible !important; /* Allow dropdowns to spill out */
}

.list-item-content {
    flex-grow: 1;
}

/* When hovering or interacting with a list item, bring it to the front */
.list-item:hover, 
.list-item:focus-within {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px var(--shadow-hover-color);
    z-index: 100; /* Crucial Fix: Higher than siblings so menu isn't hidden */
}

/* ========================================= */
/* === NAVIGATION BAR (LIQUID GLASS)     === */
/* ========================================= */
.navbar {
    background-color: var(--surface-background);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 1rem 0;
    border-bottom: var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 30px var(--shadow-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    position: relative;
}

.nav-logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--heading-color);
    text-decoration: none;
    z-index: 10;
}

body.dark-theme .nav-logo {
    background-image: var(--primary-gradient);
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
    display: block;
    transition: background-color 0.2s, color 0.2s;
}

.nav-menu a:hover {
    background-color: rgba(0,0,0,0.05);
    color: var(--primary-color);
}

body.dark-theme .nav-menu a:hover {
    background-color: rgba(255,255,255,0.08);
}

.nav-balance {
    font-weight: 600;
    color: var(--success-color);
    background-color: var(--success-background);
    padding: 6px 12px;
    border-radius: 20px;
    margin-right: 15px;
    font-size: 0.9rem;
    border: 1px solid var(--success-color);
    backdrop-filter: var(--glass-blur);
}

.nav-balance i { margin-right: 5px; }

/* ========================================= */
/* === BUTTONS                           === */
/* ========================================= */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(0,0,0,0.1);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.btn-primary {
    background-image: var(--primary-gradient);
    color: #fff;
}

.btn-primary:hover { color: #fff; }

.btn-secondary {
    background-color: var(--surface-background);
    color: var(--primary-color);
    border: var(--glass-border);
    padding: 10px 22px;
    backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.btn-danger { background-color: var(--danger-color); color: white; }
.btn-large { padding: 15px 30px; font-size: 1.1rem; }
.btn-small { padding: 5px 10px; font-size: 0.8rem; }

/* --- AMOLED DARK THEME BUTTON OVERRIDES --- */
body.dark-theme .btn-primary {
    background-image: none;
    background-color: #FFFFFF;
    color: #000000;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

body.dark-theme .btn-primary:hover {
    background-color: #f0f0f0;
    color: #000000;
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
}

body.dark-theme .btn-secondary {
    background-color: var(--surface-background);
    color: #FFFFFF;
    border: var(--glass-border);
}

body.dark-theme .btn-secondary:hover {
    background-color: #FFFFFF;
    color: #000000;
    box-shadow: 0 0 25px rgba(255, 255, 255, 0.3);
}

body.dark-theme .btn-danger {
    background-color: var(--danger-color);
    color: #000;
    font-weight: 700;
}

/* ========================================= */
/* === FORMS & MESSAGES (LIQUID GLASS)   === */
/* ========================================= */
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--heading-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: var(--glass-border);
    border-radius: 12px;
    background-color: var(--input-background);
    backdrop-filter: var(--glass-blur);
    color: var(--text-color);
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-shadow: inset 0 1px 2px var(--shadow-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--shadow-color), inset 0 1px 2px var(--shadow-color);
}

.form-control::placeholder { color: var(--text-color); opacity: 0.6; }

.message {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 12px;
    text-align: center;
    font-weight: 500;
    border: 1px solid transparent;
    backdrop-filter: var(--glass-blur);
}

.message.success {
    background-color: var(--success-background);
    color: var(--success-color);
    border-color: var(--success-color);
}

.message.error {
    background-color: var(--danger-background);
    color: var(--danger-color);
    border-color: var(--danger-color);
}

/* ========================================= */
/* === DYNAMIC QUIZ INTERFACE            === */
/* ========================================= */
.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 20px;
}

.progress-container {
    flex-grow: 1;
    height: 12px;
    background-color: var(--input-background);
    border-radius: 6px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background-image: var(--primary-gradient);
    border-radius: 6px;
    transition: width 0.4s ease;
}

.timer-display {
    display: flex;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    background-color: var(--input-background);
    padding: 5px 15px;
    border-radius: 20px;
    min-width: 150px;
    justify-content: space-between;
}

.timer-display .question-timer {
    color: var(--primary-color);
    font-weight: 700;
}

#question-text {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 2.5rem;
    text-align: center;
    color: var(--heading-color);
}

.options-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 2rem;
    counter-reset: options-counter;
}

.option-btn {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 15px 15px 15px 50px;
    background: var(--surface-background);
    border: var(--glass-border);
    color: var(--text-color);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 12px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease-out;
    backdrop-filter: var(--glass-blur);
}

.option-btn::before {
    counter-increment: options-counter;
    content: counter(options-counter, upper-alpha);
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 700;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    transition: all 0.2s ease-out;
}

.option-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 7px 20px var(--shadow-color);
}

body.dark-theme .option-btn:hover:not(:disabled)::before {
    background-color: var(--primary-color);
    color: #000;
    border-color: var(--primary-color);
}

.option-btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.option-btn.selected {
    border-color: var(--primary-color) !important;
    background-color: var(--input-background) !important;
}

body.dark-theme .option-btn.selected::before {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #000 !important;
}

.option-btn.correct {
    background-color: var(--success-background) !important;
    border-color: var(--success-color) !important;
    color: var(--heading-color) !important;
}

.option-btn.correct::before {
    content: '\2713';
    background-color: var(--success-color) !important;
    border-color: var(--success-color) !important;
    color: #fff !important;
    font-size: 1.2rem;
}

.option-btn.incorrect {
    background-color: var(--danger-background) !important;
    border-color: var(--danger-color) !important;
    color: var(--heading-color) !important;
    animation: shake 0.5s;
}

.option-btn.incorrect::before {
    content: '\00D7';
    background-color: var(--danger-color) !important;
    border-color: var(--danger-color) !important;
    color: #fff !important;
    font-size: 1.5rem;
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.answer-key-list {
    list-style: none;
    padding: 0;
    margin-top: 10px;
}

.answer-key-list li {
    padding: 12px;
    border: var(--glass-border);
    border-radius: 8px;
    margin-bottom: 8px;
    background-color: var(--input-background);
}

.answer-key-list li.correct-answer {
    background-color: var(--success-background);
    border-color: var(--success-color);
    color: var(--success-color);
    font-weight: 600;
}

/* ========================================= */
/* === ADMIN & TABLES                    === */
/* ========================================= */
.admin-nav {
    background-image: var(--primary-gradient);
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 20px;
}

body.dark-theme .admin-nav {
    background-image: none;
    background-color: var(--surface-background);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
}

body.dark-theme .admin-nav a {
    color: var(--heading-color);
}

.admin-nav ul { list-style: none; padding: 0; margin: 0; display: flex; justify-content: center; gap: 30px; }
.admin-nav a { color: white; text-decoration: none; font-weight: 600; font-size: 1.1rem; opacity: 0.8; transition: opacity 0.2s; }
.admin-nav a:hover { opacity: 1; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 15px; text-align: left; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
th { color: var(--heading-color); font-weight: 600; }
tr:last-child td { border-bottom: none; }
tr:hover { background-color: var(--input-background); }
.avatar-small { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }

/* ========================================= */
/* === ACTIONS DROPDOWN MENU (FIXED)     === */
/* ========================================= */
.list-item-actions { 
    position: relative; 
    display: flex;
    gap: 10px;
}

.actions-dropdown { display: block; }

.actions-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 100%; /* Position directly below button */
    margin-top: 5px; /* Small gap */
    z-index: 999; /* High z-index relative to the list item */
    background-color: var(--surface-background);
    backdrop-filter: var(--glass-blur);
    min-width: 180px;
    box-shadow: 0 8px 25px var(--shadow-color);
    border: var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
    padding: 5px 0;
}

.actions-menu.active { display: block; }

.actions-menu-item {
    color: var(--text-color);
    padding: 10px 15px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
}

.actions-menu-item:hover {
    background-color: rgba(0,0,0,0.05);
    color: var(--primary-color);
}

body.dark-theme .actions-menu-item:hover {
    background-color: rgba(255,255,255,0.08);
}

.actions-menu-item.danger-item { color: var(--danger-color); }
.actions-menu-item.danger-item:hover {
    background-color: var(--danger-background);
    color: var(--danger-color);
}

.actions-menu form { margin: 0; }
.actions-menu-item i { width: 16px; text-align: center; }

/* ========================================= */
/* === THEME TOGGLE SWITCH               === */
/* ========================================= */
.theme-switch-wrapper { display: flex; align-items: center; margin-left: 15px; }
.theme-switch { position: relative; display: inline-block; width: 50px; height: 28px; }
.theme-switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #333; transition: .4s; border-radius: 28px; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 4px; bottom: 4px; background-color: white; transition: .4s; border-radius: 50%; }
input:checked + .slider { background-image: var(--primary-gradient); }
body.dark-theme input:checked + .slider {
    background-image: none;
    background-color: #FFFFFF;
}
body.dark-theme input:checked + .slider:before {
    background-color: #000000;
}
input:checked + .slider:before { transform: translateX(22px); }
.slider .sun-icon, .slider .moon-icon { position: absolute; top: 50%; transform: translateY(-50%); font-size: 14px; opacity: 1; transition: opacity 0.4s; }
.slider .sun-icon { left: 7px; color: #f39c12; }
.slider .moon-icon { right: 7px; color: #f1c40f; }
input:not(:checked) + .slider .moon-icon { opacity: 0; }
input:checked + .slider .sun-icon { opacity: 0; }

/* ========================================= */
/* === FOOTER                            === */
/* ========================================= */
.site-footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    color: #94a3b8;
}
body.dark-theme .site-footer { color: #64748b; }

/* ================================================================== */
/* === RESPONSIVE NAV & WIDGETS                                   === */
/* ================================================================== */
.mobile-toggles { display: flex; gap: 10px; }
.menu-toggle { display: block; background-color: transparent; border: 2px solid var(--border-color); padding: 5px 15px; border-radius: 8px; font-weight: 600; color: var(--heading-color); cursor: pointer; z-index: 10; }
.user-avatar-toggle { width: 24px; height: 24px; border-radius: 50%; vertical-align: middle; }
.nav-menu-container { position: absolute; top: calc(100% + 10px); width: 200px; background-color: var(--surface-background); backdrop-filter: var(--glass-blur); border: var(--glass-border); border-radius: 12px; box-shadow: 0 4px 12px var(--shadow-color); max-height: 0; overflow: hidden; transition: max-height 0.3s ease-in-out, opacity 0.3s; opacity: 0; }
#main-menu-container { right: 0; }
#user-menu-container { right: 0; }
.nav-menu-container.active { max-height: 500px; opacity: 1; }
.nav-menu { list-style: none; padding: 10px; margin: 0; display: flex; flex-direction: column; gap: 5px; }
.nav-menu .btn { text-align: center; }
.profile-link-mobile { display: block; }
.profile-link-desktop { display: none; }
.user-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; margin-left: 10px; }

@media (min-width: 992px) {
    .mobile-toggles { display: none; }
    .nav-menu-container { position: static; max-height: none; width: auto; border: none; box-shadow: none; opacity: 1; overflow: visible; background: none; backdrop-filter: none; }
    .nav-menu { flex-direction: row; align-items: center; padding: 0; gap: 25px; }
    .theme-switch-wrapper { margin: 0; }
    .navbar .container { display: grid; grid-template-columns: auto 1fr auto auto auto; align-items: center; }
    #main-menu-container { justify-self: start; margin-left: 40px; }
    #google_translate_element_desktop { grid-column: 3 / 4; justify-self: end; }
    .theme-switch-wrapper-desktop { grid-column: 4 / 5; justify-self: end; }
    #user-menu-container { grid-column: 5 / 6; justify-self: end; }
    .profile-link-mobile { display: none; }
    .profile-link-desktop { display: flex; align-items: center; }
}

#google_translate_element_desktop { display: none; }
#google_translate_element_mobile { display: block; padding: 8px 12px; }
.goog-te-combo { background-color: var(--surface-background); color: var(--text-color); border: 2px solid var(--border-color); border-radius: 8px; padding: 8px; font-family: 'Poppins', sans-serif; font-weight: 500; }
body { top: 0 !important; }
.skiptranslate { display: none !important; }
#goog-gt-tt { display: none !important; }

@media (min-width: 992px) {
    #google_translate_element_desktop { display: block; }
    #google_translate_element_mobile { display: none; }
}

.profile-container { display: flex; align-items: flex-start; gap: 40px; }
.profile-avatar img { width: 120px; height: 120px; border-radius: 50%; border: 4px solid var(--primary-color); object-fit: cover; }
.profile-details { flex-grow: 1; }

/* ========================================= */
/* === SHARE MODAL STYLES                === */
/* ========================================= */
.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: var(--glass-blur);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal.active {
    opacity: 1;
    visibility: visible;
}
.modal.active .modal-content {
    transform: translateY(0);
}
.close-button {
    position: absolute;
    top: 10px;
    right: 15px;
    color: var(--text-color);
    opacity: 0.7;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s, opacity 0.2s;
}
.close-button:hover,
.close-button:focus {
    color: var(--heading-color);
    opacity: 1;
}
.social-share-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 1rem;
}
.social-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform 0.2s ease;
}
.social-icon:hover {
    transform: scale(1.1);
}
.social-icon.telegram  { background-color: #24A1DE; }
.social-icon.whatsapp  { background-color: #25D366; }
.social-icon.instagram { background: #d6249f; background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%,#d6249f 60%,#285AEB 90%); }

/* ========================================= */
/* === ADDITIONAL STYLES FOR THIS DEMO   === */
/* ========================================= */
.hero-section {
    text-align: center;
    padding: 80px 0;
    margin-bottom: 40px;
}
.hero-section h1 {
    margin-bottom: 20px;
}
.hero-section p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
}
.feature-card {
    text-align: center;
    padding: 30px;
}
.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}
.stats-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin: 40px 0;
}
.stat-card {
    text-align: center;
    padding: 20px;
    min-width: 150px;
}
.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--primary-color);
}
.stat-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.demo-section {
    margin: 60px 0;
}
.demo-section h2 {
    text-align: center;
    margin-bottom: 40px;
}