/* ============ RESET & VARIABLES - STUDIO DARK THEME ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    background: #0B0D10;
    color: #E9EEF5;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    width: 100%;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 30%, rgba(64, 224, 255, 0.03) 0%, transparent 45%),
                radial-gradient(circle at 80% 70%, rgba(64, 224, 255, 0.03) 0%, transparent 45%);
    pointer-events: none;
    z-index: 0;
}

main {
    flex: 1;
    position: relative;
    z-index: 1;
    width: 100%;
}

:root {
    --primary: #40E0FF;
    --primary-dark: #00B8D4;
    --primary-light: rgba(64, 224, 255, 0.15);
    --primary-glow: rgba(64, 224, 255, 0.25);
    --secondary: #40E0FF;
    --accent: #00B8D4;
    --warning: #FFB74D;
    --danger: #FF5252;
    --success: #4CAF50;
    --info: #40E0FF;
    --surface-0: #0B0D10;
    --surface-1: #151A21;
    --surface-2: #1E2630;
    --surface-3: #273140;
    --text-primary: #E9EEF5;
    --text-secondary: #C0C8D2;
    --text-tertiary: #9AA5B5;
    --text-muted: #6B7A8F;
    --border: #273140;
    --border-strong: #3A4A60;
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 30px rgba(64, 224, 255, 0.25);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --cyan-gradient: linear-gradient(135deg, #40E0FF, #00B8D4);
}

.container {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

@media (min-width: 640px) { .container { padding: 0 24px; } }
@media (max-width: 639px) { .container { padding: 0 16px; } }

/* ===== HEADER STYLES ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: all 0.3s ease;
    background: rgba(11, 13, 16, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #273140;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

@media (max-width: 768px) { .header-container { padding: 12px 16px; } }
@media (max-width: 480px) { .header-container { padding: 10px 12px; } }

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
    position: relative;
    padding: 4px 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--cyan-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-size: 1.2rem;
    box-shadow: 0 0 20px rgba(64, 224, 255, 0.3);
    transition: var(--transition);
}

.logo-link:hover .logo-icon {
    transform: rotate(5deg) scale(1.05);
    box-shadow: 0 0 30px rgba(64, 224, 255, 0.5);
}

.brand-name {
    font-size: 1.3rem;
    font-weight: 800;
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: #E9EEF5;
    letter-spacing: -0.5px;
    white-space: nowrap;
}

@media (max-width: 768px) { .brand-name { font-size: 1.1rem; } }
@media (max-width: 480px) { .brand-name { font-size: 1rem; } }

.brand-name span {
    color: #40E0FF;
    font-weight: 800;
    position: relative;
}

.brand-name span::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--cyan-gradient);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: right;
}

.logo-link:hover .brand-name span::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Desktop Navigation */
.nav-desktop {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: nowrap;
    justify-content: center;
    margin: 0 auto;
    padding: 4px 8px;
    background: rgba(21, 26, 33, 0.6);
    border-radius: 60px;
    border: 1px solid #273140;
    backdrop-filter: blur(8px);
}

@media (max-width: 1200px) { .nav-desktop { display: none; } }

.nav-link {
    color: #9AA5B5;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
    padding: 8px 14px;
    border-radius: 40px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    position: relative;
    border: 1px solid transparent;
}

.nav-link i {
    font-size: 0.8rem;
    color: #6B7A8F;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: #40E0FF;
    background: rgba(64, 224, 255, 0.1);
    border-color: rgba(64, 224, 255, 0.2);
    transform: translateY(-1px);
}

.nav-link:hover i {
    color: #40E0FF;
    transform: scale(1.1);
}

.nav-link.active {
    background: var(--cyan-gradient);
    color: #0B0D10;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(64, 224, 255, 0.3);
}

.nav-link.active i { color: #0B0D10; }

.nav-dropdown { position: relative; }
.dropdown-toggle { cursor: pointer; }

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #151A21;
    border-radius: 16px;
    padding: 8px;
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    border: 1px solid #273140;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1000;
    backdrop-filter: blur(12px);
}

.nav-dropdown:hover .dropdown-menu,
.dropdown-menu:hover {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: #9AA5B5;
    text-decoration: none;
    font-size: 0.8rem;
    border-radius: 10px;
    transition: all 0.2s ease;
}

.dropdown-menu a i {
    width: 18px;
    color: #40E0FF;
    font-size: 0.9rem;
}

.dropdown-menu a:hover {
    background: rgba(64, 224, 255, 0.1);
    color: #40E0FF;
    transform: translateX(4px);
}

.dropdown-menu a.active {
    background: rgba(64, 224, 255, 0.15);
    color: #40E0FF;
    font-weight: 600;
}

.dropdown-group-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    color: #40E0FF;
    padding: 8px 12px 4px;
    margin-top: 4px;
    border-bottom: 1px solid #273140;
}

.dropdown-group-title:first-of-type { margin-top: 0; }

/* Action Buttons */
.action-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Auth Button Styles */
.auth-btn {
    padding: 8px 16px;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    background: #1E2630;
    border: 1px solid #273140;
    color: #E9EEF5;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: var(--transition);
    height: 44px;
}

.auth-btn i { font-size: 0.8rem; color: #40E0FF; }
.auth-btn:hover {
    background: var(--cyan-gradient);
    border-color: transparent;
    color: #0B0D10;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(64, 224, 255, 0.3);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 4px;
    background: #1E2630;
    border: 1px solid #273140;
    border-radius: 60px;
    padding: 3px 3px 3px 10px;
    transition: var(--transition);
    height: 44px;
}

.user-profile:hover {
    border-color: #40E0FF;
    background: rgba(64, 224, 255, 0.1);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--cyan-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-weight: 600;
    font-size: 0.9rem;
}

.sign-out-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: #9AA5B5;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.sign-out-btn:hover {
    color: #FF5252;
    transform: scale(1.1);
    background: rgba(255, 82, 82, 0.1);
}

@media (max-width: 768px) {
    .auth-btn { padding: 6px 12px; height: 40px; font-size: 0.75rem; }
    .user-profile { padding: 2px 2px 2px 8px; height: 40px; }
    .user-avatar { width: 32px; height: 32px; font-size: 0.8rem; }
    .sign-out-btn { width: 32px; height: 32px; }
}

@media (max-width: 480px) {
    .auth-btn { padding: 6px 10px; height: 36px; font-size: 0.7rem; }
    .auth-btn span { display: none; }
    .auth-btn i { font-size: 0.9rem; margin: 0; }
    .user-profile { padding: 2px; height: 36px; }
    .user-avatar { width: 28px; height: 28px; font-size: 0.7rem; }
    .sign-out-btn { width: 28px; height: 28px; }
}

@keyframes profileSlideIn {
    from { opacity: 0; transform: translateX(10px); }
    to { opacity: 1; transform: translateX(0); }
}

.user-profile { animation: profileSlideIn 0.3s ease-out; }

/* Ko-fi Button */
.kofi-link {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #1E2630;
    border: 1px solid #273140;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    text-decoration: none;
}

.kofi-link:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: #40E0FF;
    background: var(--cyan-gradient);
    box-shadow: 0 5px 20px rgba(64, 224, 255, 0.4);
}

@media (max-width: 480px) { .kofi-link { width: 40px; height: 40px; } }

.coffee-cup { position: relative; width: 22px; height: 22px; display: flex; justify-content: center; align-items: center; }
.cup-body { position: relative; width: 18px; height: 16px; background: linear-gradient(135deg, #FFD700, #FFA500); border-radius: 0 0 8px 8px; animation: cupFill 2s ease-in-out infinite alternate; }
.cup-body::before { content: ''; position: absolute; top: 2px; left: 2px; width: 14px; height: 12px; background: linear-gradient(135deg, #FFE55C, #FFB347); border-radius: 0 0 6px 6px; opacity: 0.8; }
.cup-handle { position: absolute; top: 2px; right: -5px; width: 5px; height: 8px; border: 2px solid #FFD700; border-left: none; border-radius: 0 4px 4px 0; opacity: 0.8; }
.coffee-liquid { position: absolute; top: -2px; left: 2px; width: 14px; height: 3px; background: linear-gradient(90deg, #8B4513, #A0522D); border-radius: 2px; animation: liquidWave 2s ease-in-out infinite; }
.coffee-steam { position: absolute; top: -8px; left: 5px; display: flex; gap: 2px; opacity: 0; transition: opacity 0.3s ease; }
.kofi-link:hover .coffee-steam { opacity: 1; }
.coffee-steam span { width: 2px; height: 8px; background: linear-gradient(to top, rgba(255,255,255,0.8), transparent); border-radius: 1px; animation: steam 1.5s ease-in-out infinite; }
.coffee-steam span:nth-child(1) { animation-delay: 0s; }
.coffee-steam span:nth-child(2) { animation-delay: 0.3s; }
.coffee-steam span:nth-child(3) { animation-delay: 0.6s; }

.kofi-tooltip {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    background: var(--cyan-gradient);
    color: #0B0D10;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: none;
}

.kofi-tooltip::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 8px;
    height: 8px;
    background: #40E0FF;
    border-radius: 2px;
}

.kofi-link:hover .kofi-tooltip {
    opacity: 1;
    visibility: visible;
    bottom: -40px;
    transform: translateX(-50%) scale(1);
}

@keyframes cupFill { 0% { transform: scaleY(1); } 100% { transform: scaleY(1.05); } }
@keyframes liquidWave { 0%,100% { transform: translateX(0) scaleX(1); } 25% { transform: translateX(1px) scaleX(1.05); } 75% { transform: translateX(-1px) scaleX(0.95); } }
@keyframes steam { 0% { transform: translateY(0) scaleX(1); opacity: 0.8; } 50% { transform: translateY(-5px) scaleX(1.5); opacity: 0.4; } 100% { transform: translateY(-10px) scaleX(2); opacity: 0; } }

/* Mobile Menu Button */
.mobile-menu-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #1E2630;
    border: 1px solid #273140;
    display: none;
    align-items: center;
    justify-content: center;
    color: #40E0FF;
    transition: var(--transition);
    flex-shrink: 0;
    cursor: pointer;
}

.mobile-menu-btn i { font-size: 1.1rem; }
.mobile-menu-btn:hover {
    background: var(--cyan-gradient);
    color: #0B0D10;
    transform: translateY(-2px);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(64, 224, 255, 0.3);
}

@media (max-width: 1200px) { .mobile-menu-btn { display: flex; } }
@media (max-width: 480px) { .mobile-menu-btn { width: 40px; height: 40px; } }

/* Mobile Menu Panel */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: #151A21;
    z-index: 1000;
    transition: right 0.3s ease;
    padding: 80px 20px 20px;
    border-left: 1px solid #273140;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.mobile-menu.active { right: 0; }
.mobile-menu-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
.mobile-menu-close { width: 40px; height: 40px; border-radius: 50%; background: #1E2630; border: 1px solid #273140; display: flex; align-items: center; justify-content: center; color: #40E0FF; cursor: pointer; transition: var(--transition); }
.mobile-menu-close:hover { background: var(--cyan-gradient); color: #0B0D10; transform: rotate(90deg); }

.mobile-nav-links { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    color: #9AA5B5;
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 12px;
    transition: var(--transition);
}

.mobile-nav-link i { width: 20px; color: #40E0FF; }
.mobile-nav-link:hover { background: rgba(64, 224, 255, 0.1); color: #40E0FF; transform: translateX(5px); }
.mobile-nav-link.active { background: rgba(64, 224, 255, 0.15); color: #40E0FF; font-weight: 600; }

.mobile-divider { height: 1px; background: #273140; margin: 16px 0; }
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-menu-overlay.active { opacity: 1; visibility: visible; }

@media (min-width: 1201px) {
    .mobile-menu, .mobile-menu.active, .mobile-menu-overlay, .mobile-menu-overlay.active { display: none; }
}

/* Tooltip Styles */
[data-tooltip] { position: relative; cursor: pointer; }
[data-tooltip]:before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 6px 12px;
    background: #1E293B;
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: 20px;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 10000;
}

[data-tooltip]:after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    border: 5px solid transparent;
    border-top-color: #1E293B;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
    z-index: 10000;
}

[data-tooltip]:hover:before,
[data-tooltip]:hover:after {
    opacity: 1;
    visibility: visible;
}

[data-tooltip]:hover:before { transform: translateX(-50%) translateY(-8px); }
[data-tooltip]:hover:after { transform: translateX(-50%) translateY(-2px); }

[data-tooltip][data-tooltip-position="bottom"]:before {
    top: 100%;
    bottom: auto;
    transform: translateX(-50%) translateY(8px);
}
[data-tooltip][data-tooltip-position="bottom"]:after {
    top: 100%;
    bottom: auto;
    transform: translateX(-50%) translateY(-4px);
    border: 5px solid transparent;
    border-bottom-color: #1E293B;
    border-top-color: transparent;
}
[data-tooltip][data-tooltip-position="bottom"]:hover:before { transform: translateX(-50%) translateY(8px); }

/* Section Styles */
.section-padding { padding: 100px 0 60px; }
@media (max-width: 768px) { .section-padding { padding: 80px 0 40px; } }

.section-header { text-align: center; margin-bottom: 40px; }
.section-header h1 { font-size: 2.2rem; font-weight: 800; color: var(--text-primary); font-family: 'Plus Jakarta Sans', sans-serif; }
@media (min-width: 768px) { .section-header h1 { font-size: 2.8rem; } }
@media (max-width: 767px) { .section-header h1 { font-size: 1.8rem; } }

.gradient-text {
    background: var(--cyan-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(64, 224, 255, 0.1);
    border: 1px solid #273140;
    padding: 6px 18px;
    border-radius: 60px;
    font-size: 0.75rem;
    color: #40E0FF;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Lab Grid */
.lab-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
@media (min-width: 1200px) { .lab-grid { grid-template-columns: 1fr 1.2fr; } }

/* Glass Panel */
.glass-panel {
    background: #151A21;
    border: 1px solid #273140;
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}
.glass-panel:hover { border-color: #40E0FF; box-shadow: 0 0 0 1px #40E0FF, var(--shadow-lg); }
@media (max-width: 768px) { .glass-panel { padding: 20px 16px; } }

/* Upload Zone */
.upload-zone {
    border: 2px dashed #273140;
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    background: #1E2630;
    margin-bottom: 20px;
    cursor: pointer;
    transition: var(--transition);
}
.upload-zone:hover { border-color: #40E0FF; background: rgba(64, 224, 255, 0.05); }
.upload-zone.dragover { border-color: #40E0FF; background: rgba(64, 224, 255, 0.1); transform: scale(1.02); }
.upload-zone i { font-size: 2.5rem; color: #40E0FF; margin-bottom: 10px; }
.upload-zone h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); }
.upload-zone p { color: #9AA5B5; font-size: 0.85rem; }
@media (max-width: 480px) { .upload-zone { padding: 20px 15px; } .upload-zone i { font-size: 2rem; } }

/* Axis Container */
.axis-container { margin: 20px 0; max-height: 350px; overflow-y: auto; padding-right: 8px; }
.axis-container::-webkit-scrollbar { width: 4px; }
.axis-container::-webkit-scrollbar-track { background: #1E2630; border-radius: 4px; }
.axis-container::-webkit-scrollbar-thumb { background: #40E0FF; border-radius: 4px; }

.axis-card {
    background: #1E2630;
    border: 1px solid #273140;
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 12px;
    transition: var(--transition);
}
.axis-card:hover { border-color: #40E0FF; box-shadow: 0 0 0 1px #40E0FF; }
.axis-header { display: flex; justify-content: space-between; margin-bottom: 10px; }
.axis-tag { background: #151A21; border: 1px solid #273140; padding: 2px 10px; border-radius: 20px; font-size: 0.7rem; font-weight: 600; color: #40E0FF; }
.axis-name { color: #9AA5B5; font-size: 0.8rem; }

.slider-row { display: flex; align-items: center; gap: 12px; }
@media (max-width: 768px) { .slider-row { flex-direction: column; align-items: stretch; } }
.slider-row input[type=range] { flex: 1; height: 4px; background: #273140; border-radius: 2px; -webkit-appearance: none; appearance: none; }
.slider-row input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--cyan-gradient); border: 2px solid white; cursor: pointer; transition: var(--transition); }
.slider-row input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
.slider-value { font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; color: #40E0FF; min-width: 50px; text-align: right; }
@media (max-width: 768px) { .slider-value { text-align: center; } }
.axis-range { font-size: 0.7rem; color: #6B7A8F; text-align: right; margin-top: 4px; }

/* Neural Panel */
.neural-panel {
    background: #1E2630;
    border: 1px solid #273140;
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 20px 0;
    transition: var(--transition);
}
.neural-panel:hover { border-color: #40E0FF; }
.neural-panel h4 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; color: var(--text-primary); }
.neural-panel h4 i { color: #40E0FF; }
.panel-badge { background: var(--cyan-gradient); color: #0B0D10; padding: 4px 12px; border-radius: 30px; font-size: 0.7rem; font-weight: 600; }

/* APCA Meter */
.apca-meter {
    background: #1E2630;
    border: 1px solid #273140;
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 20px 0;
    transition: var(--transition);
}
.apca-meter:hover { border-color: #40E0FF; }
.meter-header { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 0.8rem; color: #9AA5B5; }
.meter-value { font-family: 'JetBrains Mono', monospace; font-size: 1.4rem; font-weight: 600; }
.meter-bar { height: 4px; background: #273140; border-radius: 2px; overflow: hidden; }
.meter-fill { height: 100%; background: linear-gradient(90deg, #FF5252, #FFB74D, #4CAF50, #40E0FF); transition: width 0.2s ease; }

/* Blink Calibration */
.blink-calibration-container {
    position: relative;
    height: 250px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid #273140;
    transition: var(--transition);
}
.blink-calibration-container:hover { border-color: #40E0FF; }
.base-layer, .compensated-layer { position: absolute; top: 0; left: 0; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.blink-text { font-size: 4rem; font-weight: 500; }
@media (max-width: 768px) { .blink-calibration-container { height: 200px; } .blink-text { font-size: 3rem !important; } }

.pulsation-indicator {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #FF5252;
    animation: pulse 1s infinite;
}
.pulsation-indicator.perfect { background: #4CAF50; animation: none; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.3); } }

.calibration-guide {
    background: #151A21;
    border: 1px solid #273140;
    border-radius: 40px;
    padding: 10px 20px;
    display: inline-flex;
    align-items: center;
    gap: 16px;
    margin-top: 16px;
}
@media (max-width: 480px) { .calibration-guide { flex-wrap: wrap; justify-content: center; gap: 10px; } }

.blink-speed-control {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    padding: 12px;
    background: #151A21;
    border-radius: var(--radius-md);
    border: 1px solid #273140;
}
@media (max-width: 480px) { .blink-speed-control { flex-wrap: wrap; } }
.blink-speed-control label { color: #9AA5B5; font-size: 0.8rem; min-width: 80px; }
.blink-speed-control input { flex: 1; height: 4px; background: #273140; border-radius: 2px; }
.blink-speed-control span { color: #40E0FF; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; min-width: 45px; }

/* Toggle Group */
.toggle-group {
    display: flex;
    background: #1E2630;
    border-radius: 40px;
    padding: 4px;
    margin: 20px 0;
    border: 1px solid #273140;
    flex-wrap: wrap;
}
.toggle-option {
    flex: 1;
    text-align: center;
    padding: 8px 16px;
    border-radius: 40px;
    cursor: pointer;
    font-size: 0.85rem;
    color: #9AA5B5;
    min-width: 70px;
    transition: var(--transition);
}
.toggle-option:hover { background: rgba(64, 224, 255, 0.1); color: #40E0FF; }
.toggle-option.active { background: var(--cyan-gradient); color: #0B0D10; box-shadow: 0 4px 12px rgba(64, 224, 255, 0.3); }
@media (max-width: 480px) { .toggle-option { padding: 6px 8px; font-size: 0.75rem; min-width: 60px; } }

/* Buttons */
.blink-btn {
    background: var(--cyan-gradient);
    border: none;
    color: #0B0D10;
    padding: 12px 20px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    width: 100%;
    margin: 12px 0;
    transition: var(--transition);
}
.blink-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(64, 224, 255, 0.3); }
.blink-btn.secondary { background: #1E2630; color: var(--text-primary); border: 1px solid #273140; }
.blink-btn.secondary:hover { background: rgba(64, 224, 255, 0.1); border-color: #40E0FF; }
.blink-btn.calibrating { background: #4CAF50; color: white; }

/* Device Indicators */
.device-indicator {
    flex: 1;
    min-width: 60px;
    text-align: center;
    padding: 8px;
    border-radius: var(--radius-sm);
    background: #1E2630;
    border: 1px solid #273140;
    cursor: pointer;
    transition: var(--transition);
}
.device-indicator:hover { border-color: #40E0FF; background: rgba(64, 224, 255, 0.1); transform: translateY(-2px); }
.device-indicator i { color: #9AA5B5; }
.device-indicator.active { border-color: #40E0FF; background: rgba(64, 224, 255, 0.15); }
.device-indicator.active i { color: #40E0FF; }
.device-indicator div { font-size: 0.65rem; color: #9AA5B5; }
@media (max-width: 768px) { .device-indicator { min-width: 50px; padding: 6px; } }

/* Export Tabs */
.export-tabs { display: flex; gap: 8px; margin: 16px 0; flex-wrap: wrap; }
.export-tab {
    padding: 6px 16px;
    border-radius: 30px;
    background: #1E2630;
    border: 1px solid #273140;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
    color: #9AA5B5;
}
.export-tab:hover { background: rgba(64, 224, 255, 0.1); border-color: #40E0FF; color: #40E0FF; }
.export-tab.active { background: var(--cyan-gradient); color: #0B0D10; border-color: transparent; }

.code-snippet {
    background: #1E2630;
    padding: 16px;
    border-radius: var(--radius-md);
    border-left: 3px solid #40E0FF;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid #273140;
    color: #C0C8D2;
}
.code-snippet::-webkit-scrollbar { width: 4px; }
.code-snippet::-webkit-scrollbar-track { background: #273140; }
.code-snippet::-webkit-scrollbar-thumb { background: #40E0FF; }

/* Preview Styles */
.preview-stacked { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 768px) { .preview-stacked { grid-template-columns: 1fr; gap: 20px; } }

.preview-card {
    background: #151A21;
    border-radius: var(--radius-md);
    padding: 16px;
    border: 1px solid #273140;
}
.preview-card h4 { font-size: 0.8rem; color: #9AA5B5; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }

.split-overlay-container {
    position: relative;
    height: 300px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid #273140;
    cursor: col-resize;
}
@media (max-width: 768px) { .split-overlay-container { height: 250px; } }
.overlay-divider { position: absolute; top: 0; width: 2px; height: 100%; background: #40E0FF; transform: translateX(-50%); z-index: 10; box-shadow: 0 0 10px #40E0FF; }

.dark-mode-css {
    margin-top: 16px;
    padding: 16px;
    background: #1E2630;
    border-radius: var(--radius-md);
    border: 1px solid #273140;
}
.dark-mode-css h5 { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--text-primary); margin-bottom: 12px; }
.dark-mode-css h5 i { color: #40E0FF; }

/* Tutorial Section */
.tutorial-section {
    margin-top: 30px;
    padding: 20px;
    background: #1E2630;
    border-radius: var(--radius-md);
    border: 1px solid #273140;
}
.tutorial-header { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid #273140; }
.tutorial-header h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.tutorial-header i { font-size: 1.2rem; color: #40E0FF; animation: pulse 2s infinite; }

.tutorial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (max-width: 768px) { .tutorial-grid { grid-template-columns: 1fr; } }

.tutorial-card {
    background: #151A21;
    border-radius: var(--radius-sm);
    padding: 12px;
    border: 1px solid #273140;
    transition: var(--transition);
}
.tutorial-card:hover { transform: translateY(-2px); border-color: #40E0FF; box-shadow: 0 4px 8px rgba(64, 224, 255, 0.1); }
.tutorial-card .step-number {
    display: inline-block;
    background: var(--cyan-gradient);
    color: #0B0D10;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    text-align: center;
    line-height: 22px;
    font-weight: 600;
    font-size: 0.75rem;
    margin-bottom: 8px;
}
.tutorial-card h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 4px; color: var(--text-primary); }
.tutorial-card p { font-size: 0.75rem; color: #9AA5B5; line-height: 1.4; margin-bottom: 8px; }
.tutorial-card .live-value {
    margin-top: 8px;
    padding: 6px;
    background: #1E2630;
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: #40E0FF;
    border: 1px solid #273140;
    display: flex;
    align-items: center;
    gap: 6px;
}
.tutorial-card .live-value i { font-size: 0.7rem; color: #6B7A8F; }

.tutorial-progress {
    margin-top: 16px;
    padding: 12px;
    background: linear-gradient(135deg, rgba(64, 224, 255, 0.1), transparent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.tutorial-progress-text { display: flex; align-items: center; gap: 8px; font-size: 0.75rem; color: #9AA5B5; }
.tutorial-progress-text i { font-size: 0.8rem; color: #40E0FF; }
.tutorial-progress-bar { flex: 1; height: 6px; background: #273140; border-radius: 3px; overflow: hidden; min-width: 150px; }
.tutorial-progress-fill { height: 100%; background: linear-gradient(90deg, #40E0FF, #00B8D4); width: 0%; transition: width 0.3s ease; border-radius: 3px; }

/* Font Grading Education Section */
.grading-education {
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, #151A21, #1E2630);
    border-radius: var(--radius-md);
    border: 1px solid #273140;
    position: relative;
    overflow: hidden;
}
.grading-education::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #40E0FF, #00B8D4);
    border-radius: 4px 0 0 4px;
}

.grading-header { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.grading-header i { font-size: 1.4rem; color: #40E0FF; animation: gentlePulse 3s infinite; }
.grading-header h4 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }

.grading-content p { font-size: 0.85rem; color: #9AA5B5; line-height: 1.6; margin-bottom: 16px; }
.grading-highlight { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; padding: 12px; background: #151A21; border-radius: var(--radius-sm); border: 1px solid #273140; }
.grading-badge { background: rgba(64, 224, 255, 0.1); color: #40E0FF; padding: 4px 12px; border-radius: 30px; font-size: 0.75rem; font-weight: 600; border: 1px solid #273140; }

.grading-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 20px; }
@media (max-width: 768px) { .grading-stats { grid-template-columns: 1fr; } }
.grading-stat {
    background: #151A21;
    padding: 12px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid #273140;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}
.grading-stat:hover { transform: translateY(-2px); border-color: #40E0FF; box-shadow: 0 4px 8px rgba(64, 224, 255, 0.1); }
.grading-stat i { font-size: 1.2rem; color: #40E0FF; }
.grading-stat-label { font-size: 0.65rem; color: #6B7A8F; text-transform: uppercase; letter-spacing: 0.3px; }
.grading-stat-value { font-size: 1.1rem; font-weight: 600; font-family: 'JetBrains Mono', monospace; line-height: 1.2; color: var(--text-primary); }

.grading-importance { margin-bottom: 16px; }
.grading-importance h5 { font-size: 0.9rem; font-weight: 600; margin-bottom: 12px; display: flex; align-items: center; gap: 6px; color: var(--text-primary); }
.grading-importance h5 i { color: #40E0FF; font-size: 0.9rem; }
.grading-importance ul { list-style: none; padding: 0; }
.grading-importance li { font-size: 0.8rem; color: #9AA5B5; margin-bottom: 10px; display: flex; align-items: flex-start; gap: 8px; line-height: 1.5; }
.grading-importance li i { color: #4CAF50; font-size: 0.8rem; margin-top: 3px; flex-shrink: 0; }
.grading-importance li strong { color: var(--text-primary); font-weight: 600; }

.grading-tip {
    background: linear-gradient(135deg, rgba(64, 224, 255, 0.08), rgba(64, 224, 255, 0.02));
    padding: 14px;
    border-radius: var(--radius-sm);
    border-left: 3px solid #40E0FF;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.grading-tip i { color: #40E0FF; font-size: 1rem; margin-top: 2px; }
.grading-tip span { font-size: 0.8rem; color: #9AA5B5; line-height: 1.5; }

@keyframes gentlePulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.8; transform: scale(1.05); } }

/* Tutorial Steps Grid */
.tutorial-steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 40px 0;
}
@media (max-width: 768px) { .tutorial-steps-grid { grid-template-columns: 1fr; gap: 20px; } }

.tutorial-step-card {
    background: #151A21;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    border: 1px solid #273140;
    position: relative;
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.tutorial-step-card:hover { transform: translateY(-10px); border-color: #40E0FF; box-shadow: 0 20px 30px -10px rgba(64, 224, 255, 0.2); }
.tutorial-step-card .step-number {
    position: absolute;
    top: -15px;
    left: 24px;
    width: 40px;
    height: 40px;
    background: var(--cyan-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-weight: 800;
    font-size: 1.2rem;
    border: 2px solid #0B0D10;
    transition: transform 0.3s ease;
}
.tutorial-step-card:hover .step-number { transform: scale(1.1); }
.tutorial-step-card i { font-size: 2.5rem; color: #40E0FF; margin-bottom: 20px; margin-top: 10px; }
.tutorial-step-card h3 { color: var(--text-primary); font-size: 1.3rem; margin-bottom: 12px; }
.tutorial-step-card p { color: #9AA5B5; font-size: 0.9rem; line-height: 1.6; margin-bottom: 16px; }
@media (max-width: 480px) { .tutorial-step-card { padding: 24px 16px; } .tutorial-step-card h3 { font-size: 1.1rem; } }

.tutorial-video-section {
    background: linear-gradient(135deg, #151A21, #1E2630);
    border-radius: var(--radius-xl);
    padding: 40px;
    border: 1px solid #273140;
    margin: 40px 0;
    position: relative;
    overflow: hidden;
}
.tutorial-video-section > div { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; position: relative; z-index: 2; }
@media (max-width: 768px) { .tutorial-video-section { padding: 30px 20px; } .tutorial-video-section > div { grid-template-columns: 1fr; gap: 30px; } }

.tutorial-faq { margin-top: 40px; }
.tutorial-faq h3 { text-align: center; color: var(--text-primary); font-size: 1.8rem; margin-bottom: 30px; }
.tutorial-faq > div { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 768px) { .tutorial-faq h3 { font-size: 1.5rem; } .tutorial-faq > div { grid-template-columns: 1fr; gap: 16px; } }
.tutorial-faq > div > div { background: #151A21; border-radius: var(--radius-md); padding: 24px; border: 1px solid #273140; }

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    left: 16px;
    right: 16px;
    transform: translateY(100px);
    background: var(--cyan-gradient);
    color: #0B0D10;
    padding: 16px 24px;
    border-radius: 60px;
    font-size: 0.9rem;
    z-index: 9999;
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
@media (min-width: 768px) { .toast { left: 50%; right: auto; transform: translateX(-50%) translateY(100px); width: auto; min-width: 350px; } }
.toast.show { transform: translateY(0); }
@media (min-width: 768px) { .toast.show { transform: translateX(-50%) translateY(0); } }
.toast.error { background: linear-gradient(135deg, #FF5252, #FF1744); color: white; }
.toast.success { background: linear-gradient(135deg, #4CAF50, #45a049); color: white; }

/* Alpine.js */
[x-cloak] { display: none !important; }

/* New Badge */
.new-badge {
    margin-left: auto;
    font-size: 0.6rem;
    background: #40E0FF;
    color: #0B0D10;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
}