/* Quizior Design System - v1.0.2 - Last Sync: 2026-04-03 */
:root {
    /* Design System - Derived from Prototype */
    --font-sans: 'Inter', ui-sans-serif, system-ui, sans-serif;

    --color-teal-50: #f0fdfa;
    --color-teal-100: #ccfbf1;
    --color-teal-500: #14b8a6;
    --color-teal-600: #0d9488;
    --color-teal-700: #0f766e;

    --color-cyan-50: #ecfeff;
    --color-cyan-100: #cffafe;
    --color-cyan-500: #06b6d4;
    --color-cyan-600: #0891b2;
    --color-cyan-700: #0e7490;

    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;

    --color-green-100: #dcfce7;
    --color-green-500: #22c55e;
    --color-green-600: #16a34a;
    --color-green-700: #15803d;

    --background: #ffffff;
    --foreground: var(--color-slate-900);
    --border: var(--color-slate-200);
    --ring: var(--color-teal-500);

    --spacing: 0.25rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

/* Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border-color: var(--border);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    zoom: 0.75;
    background-color: var(--color-slate-50) !important;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-slate-50) !important;
    color: var(--foreground);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Full-Height Section Utilities */
.section-full {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-slate-900);
    font-weight: 600;
    line-height: 1.25;
}

/* ===== PREMIUM SCROLL REVEAL ANIMATIONS ===== */
/* Modern SaaS-style reveal with performance optimization */

:root {
    --scroll-distance: 40px;
    --scroll-distance-mobile: 20px;
    --ease-premium: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base reveal - Default fade + translateY */
.scroll-reveal {
    opacity: 0;
    transform: translateY(var(--scroll-distance));
    transition: opacity 0.8s var(--ease-premium),
        transform 0.8s var(--ease-premium);
    will-change: opacity, transform;
}

.scroll-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Speed variants */
.scroll-reveal-fast {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s var(--ease-premium),
        transform 0.5s var(--ease-premium);
}

.scroll-reveal-slow {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1s var(--ease-premium),
        transform 1s var(--ease-premium);
}

/* Stagger animations */
.scroll-reveal-stagger>* {
    opacity: 0;
    transform: translateY(var(--scroll-distance));
    transition: opacity 0.7s var(--ease-premium),
        transform 0.7s var(--ease-premium);
}

.scroll-revealed.scroll-reveal-stagger>*:nth-child(1) {
    transition-delay: 0s;
}

.scroll-revealed.scroll-reveal-stagger>*:nth-child(2) {
    transition-delay: 0.15s;
}

.scroll-revealed.scroll-reveal-stagger>*:nth-child(3) {
    transition-delay: 0.3s;
}

.scroll-revealed.scroll-reveal-stagger>*:nth-child(4) {
    transition-delay: 0.45s;
}

.scroll-revealed.scroll-reveal-stagger>*:nth-child(5) {
    transition-delay: 0.6s;
}

.scroll-revealed.scroll-reveal-stagger>*:nth-child(6) {
    transition-delay: 0.75s;
}

.scroll-revealed.scroll-reveal-stagger>* {
    opacity: 1;
    transform: translateY(0);
}

/* Button animations - subtle scale */
.scroll-reveal-button {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
    transition: opacity 0.6s var(--ease-premium),
        transform 0.6s var(--ease-premium);
}

.scroll-revealed.scroll-reveal-button {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Heading animations - faster */
.scroll-reveal-heading {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.5s var(--ease-premium),
        transform 0.5s var(--ease-premium);
}

.scroll-revealed.scroll-reveal-heading {
    opacity: 1;
    transform: translateY(0);
}

/* Text animations - slower than headings */
.scroll-reveal-text {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-premium),
        transform 0.7s var(--ease-premium);
    transition-delay: 0.1s;
}

.scroll-revealed.scroll-reveal-text {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile optimization */
@media (max-width: 768px) {
    :root {
        --scroll-distance: var(--scroll-distance-mobile);
    }

    .scroll-reveal,
    .scroll-reveal-fast,
    .scroll-reveal-slow,
    .scroll-reveal-stagger>* {
        transform: translateY(var(--scroll-distance-mobile));
        transition-duration: 0.5s;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {

    .scroll-reveal,
    .scroll-reveal-fast,
    .scroll-reveal-slow,
    .scroll-reveal-stagger>*,
    .scroll-reveal-button,
    .scroll-reveal-heading,
    .scroll-reveal-text {
        opacity: 0;
        transform: none;
        transition: opacity 0.3s ease;
    }

    .scroll-revealed,
    .scroll-revealed.scroll-reveal-stagger>*,
    .scroll-revealed.scroll-reveal-button,
    .scroll-revealed.scroll-reveal-heading,
    .scroll-revealed.scroll-reveal-text {
        opacity: 1;
        transform: none;
    }
}

/* Performance optimization */
.scroll-revealed {
    will-change: auto;
}

/* ===== HERO FLOATING ICON ANIMATIONS ===== */
@keyframes float-y {
    0%, 100% { transform: translateY(0px) rotate(var(--float-rotate, 0deg)); }
    50%       { transform: translateY(-18px) rotate(var(--float-rotate, 0deg)); }
}

@keyframes float-y-alt {
    0%, 100% { transform: translateY(0px) rotate(var(--float-rotate, 0deg)); }
    50%       { transform: translateY(-12px) rotate(var(--float-rotate, 0deg)); }
}

@keyframes float-diagonal {
    0%, 100% { transform: translate(0, 0) rotate(var(--float-rotate, 0deg)); }
    33%       { transform: translate(8px, -14px) rotate(var(--float-rotate, 0deg)); }
    66%       { transform: translate(-6px, -8px) rotate(var(--float-rotate, 0deg)); }
}

@keyframes float-spin {
    0%, 100% { transform: translateY(0px) rotate(12deg); }
    50%       { transform: translateY(-14px) rotate(-8deg); }
}

@keyframes icon-glow-pulse {
    0%, 100% { opacity: 0.7; filter: drop-shadow(0 0 4px currentColor); }
    50%       { opacity: 1;   filter: drop-shadow(0 0 10px currentColor); }
}

@keyframes bg-blob-drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50%       { transform: translate(10px, -15px) scale(1.08); }
}

/* Float utility classes */
.float-slow   { animation: float-y 7s ease-in-out infinite; }
.float-medium { animation: float-y 5s ease-in-out infinite; }
.float-fast   { animation: float-y-alt 3.5s ease-in-out infinite; }
.float-diag   { animation: float-diagonal 6s ease-in-out infinite; }
.float-spin   { animation: float-spin 8s ease-in-out infinite; }
.blob-drift   { animation: bg-blob-drift 9s ease-in-out infinite; }
.icon-glow    { animation: icon-glow-pulse 2.5s ease-in-out infinite; }

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
    transition: all 0.2s;
}

input,
select,
textarea {
    font-family: inherit;
    outline: none;
}

/* Utility Classes (Mimicking Tailwind) */
.min-h-screen {
    min-height: 100vh;
}

.flex {
    display: flex;
}

.inline-flex {
    display: inline-flex;
}

.grid {
    display: grid;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.flex-col {
    flex-direction: column;
}

.gap-1 {
    gap: calc(var(--spacing) * 1);
}

.gap-2 {
    gap: calc(var(--spacing) * 2);
}

.gap-3 {
    gap: calc(var(--spacing) * 3);
}

.gap-4 {
    gap: calc(var(--spacing) * 4);
}

.gap-6 {
    gap: calc(var(--spacing) * 6);
}

.gap-8 {
    gap: calc(var(--spacing) * 8);
}

.gap-12 {
    gap: calc(var(--spacing) * 12);
}

.px-4 {
    padding-left: calc(var(--spacing) * 4);
    padding-right: calc(var(--spacing) * 4);
}

.px-5 {
    padding-left: calc(var(--spacing) * 5);
    padding-right: calc(var(--spacing) * 5);
}

.px-6 {
    padding-left: calc(var(--spacing) * 6);
    padding-right: calc(var(--spacing) * 6);
}

.px-8 {
    padding-left: calc(var(--spacing) * 8);
    padding-right: calc(var(--spacing) * 8);
}

.py-2 {
    padding-top: calc(var(--spacing) * 2);
    padding-bottom: calc(var(--spacing) * 2);
}

.py-4 {
    padding-top: calc(var(--spacing) * 4);
    padding-bottom: calc(var(--spacing) * 4);
}

.py-16 {
    padding-top: calc(var(--spacing) * 16);
    padding-bottom: calc(var(--spacing) * 16);
}

.py-24 {
    padding-top: calc(var(--spacing) * 24);
    padding-bottom: calc(var(--spacing) * 24);
}

.mt-6 {
    margin-top: calc(var(--spacing) * 6);
}

.mt-8 {
    margin-top: calc(var(--spacing) * 8);
}

.mt-12 {
    margin-top: calc(var(--spacing) * 12);
}

.mb-1 {
    margin-bottom: calc(var(--spacing) * 1);
}

.mb-2 {
    margin-bottom: calc(var(--spacing) * 2);
}

.mb-3 {
    margin-bottom: calc(var(--spacing) * 3);
}

.mb-4 {
    margin-bottom: calc(var(--spacing) * 4);
}

.mb-6 {
    margin-bottom: calc(var(--spacing) * 6);
}

.mb-8 {
    margin-bottom: calc(var(--spacing) * 8);
}

.mb-12 {
    margin-bottom: calc(var(--spacing) * 12);
}

.mb-16 {
    margin-bottom: calc(var(--spacing) * 16);
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.max-w-7xl {
    max-width: 80rem;
}

.max-w-4xl {
    max-width: 56rem;
}

.max-w-2xl {
    max-width: 42rem;
}

.w-full {
    width: 100%;
}

.w-10 {
    width: 2.5rem;
}

.h-10 {
    height: 2.5rem;
}

.w-12 {
    width: 3rem;
}

.h-12 {
    height: 3rem;
}

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

.rounded-xl {
    border-radius: var(--radius-xl);
}

.rounded-2xl {
    border-radius: var(--radius-2xl);
}

.rounded-full {
    border-radius: 9999px;
}

.bg-white {
    background-color: #ffffff;
}

.bg-slate-50 {
    background-color: var(--color-slate-50);
}

.bg-teal-100 {
    background-color: var(--color-teal-100);
}

.bg-green-100 {
    background-color: var(--color-green-100);
}

.bg-slate-900 {
    background-color: var(--color-slate-900);
}

.text-white {
    color: #ffffff;
}

.text-slate-900 {
    color: var(--color-slate-900);
}

.text-slate-800 {
    color: var(--color-slate-800);
}

.text-slate-700 {
    color: var(--color-slate-700);
}

.text-slate-600 {
    color: var(--color-slate-600);
}

.text-slate-500 {
    color: var(--color-slate-500);
}

.text-slate-400 {
    color: var(--color-slate-400);
}

.text-teal-600 {
    color: var(--color-teal-600);
}

.text-teal-700 {
    color: var(--color-teal-700);
}

.text-green-600 {
    color: var(--color-green-600);
}

.text-green-700 {
    color: var(--color-green-700);
}

.text-xs {
    font-size: 0.75rem;
}

.text-sm {
    font-size: 0.875rem;
}

.text-base {
    font-size: 1rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

.text-2xl {
    font-size: 1.5rem;
}

.text-4xl {
    font-size: 2.25rem;
}

.font-bold {
    font-weight: 700;
}

.border {
    border: 1px solid var(--border);
}

.border-b {
    border-bottom: 1px solid var(--border);
}

.border-2 {
    border-width: 2px;
}

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

.shadow-lg {
    box-shadow: var(--shadow-lg);
}

.shadow-xl {
    box-shadow: var(--shadow-xl);
}

.shadow-2xl {
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

.bg-gradient-to-br {
    background-image: linear-gradient(to bottom right, var(--tw-gradient-stops));
}

.bg-gradient-to-r {
    background-image: linear-gradient(to right, var(--tw-gradient-stops));
}

.from-teal-500 {
    --tw-gradient-from: var(--color-teal-500);
    --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(20, 184, 166, 0));
}

.to-cyan-600 {
    --tw-gradient-to: var(--color-cyan-600);
}

.from-teal-600 {
    --tw-gradient-from: var(--color-teal-600);
    --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(13, 148, 136, 0));
}

.to-cyan-700 {
    --tw-gradient-to: var(--color-cyan-700);
}

.transition-all {
    transition-property: all;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

.duration-700 {
    transition-duration: 700ms;
}

.sticky {
    position: sticky;
}

.top-0 {
    top: 0;
}

.z-50 {
    z-index: 50;
}

.backdrop-blur-sm {
    backdrop-filter: blur(4px);
}

.bg-white\/95 {
    background-color: rgba(255, 255, 255, 0.95);
}

/* Custom Components */
.btn-primary {
    background: linear-gradient(to right, var(--color-teal-500), var(--color-cyan-600));
    color: white;
    border-radius: var(--radius-lg);
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(to right, var(--color-teal-600), var(--color-cyan-700));
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-outline {
    border: 2px solid var(--color-slate-300);
    background: white;
    color: var(--color-slate-700);
    border-radius: var(--radius-lg);
    padding: 0.5rem 1.25rem;
    font-weight: 500;
}

.btn-outline:hover {
    border-color: var(--color-teal-500);
    color: var(--color-teal-600);
}

.card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    transition: all 0.3s;
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.7s ease-out forwards;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

.animate-shake {
    animation: shake 0.4s ease-in-out;
}

/* Navbar responsive */
@media (max-width: 768px) {
    .max-w-7xl {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

/* Loading States */
.loading-screen {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-slate-50);
}

.spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 4px solid var(--color-slate-200);
    border-top: 4px solid var(--color-teal-500);
    border-radius: 9999px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Glassmorphism */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Remove number input spinners */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

/* ===========================
   GLOBAL RESPONSIVE UTILITIES
   =========================== */

/* Mobile-only visibility */
.mobile-only {
    display: none !important;
}

/* Desktop-only visibility */
.desktop-only {
    display: block !important;
}

@media (max-width: 768px) {
    .mobile-only {
        display: flex !important;
    }
    .desktop-only {
        display: none !important;
    }

    /* Prevent horizontal overflow globally */
    html, body {
        overflow-x: hidden;
        width: 100%;
        max-width: 100vw;
    }

    html {
        zoom: 1 !important;
    }
}