/* ═══════════════════════════════════════════
   Usta AI  —  Premium Design System  
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ── Design Tokens ── */
:root {
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Indigo/Violet palette */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;

    /* Cyan accent */
    --accent-400: #22d3ee;
    --accent-500: #06b6d4;
    --accent-600: #0891b2;

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

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.03);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08), 0 12px 28px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.12), 0 24px 48px rgba(15, 23, 42, 0.06);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
    --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 6px 16px rgba(15, 23, 42, 0.04);
    --shadow-card-hover: 0 8px 30px rgba(15, 23, 42, 0.1), 0 4px 12px rgba(99, 102, 241, 0.06);

    /* Motion */
    --ease-out-soft: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 0.15s;
    --duration-normal: 0.25s;
    --duration-slow: 0.4s;
}

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

html, body {
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--slate-800);
    background: var(--slate-50);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--primary-100);
    color: var(--primary-800);
}

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

/* ── Animated Background ── */
.bg-mesh {
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(99, 102, 241, 0.07), transparent 50%),
        radial-gradient(ellipse 60% 50% at 80% 90%, rgba(6, 182, 212, 0.06), transparent 50%),
        radial-gradient(ellipse 40% 40% at 50% 50%, rgba(139, 92, 246, 0.04), transparent 50%);
}

/* ── Floating Particles (decorative) ── */
@keyframes float-up {
    0% { transform: translateY(0) scale(1); opacity: 0.5; }
    50% { opacity: 0.3; }
    100% { transform: translateY(-100vh) scale(0.3); opacity: 0; }
}

.particle {
    position: fixed;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary-400);
    opacity: 0;
    pointer-events: none;
    z-index: -1;
    animation: float-up linear infinite;
}

.particle:nth-child(1) { left: 10%; animation-duration: 18s; animation-delay: 0s; width: 3px; height: 3px; }
.particle:nth-child(2) { left: 25%; animation-duration: 22s; animation-delay: 3s; width: 5px; height: 5px; background: var(--accent-400); }
.particle:nth-child(3) { left: 45%; animation-duration: 20s; animation-delay: 6s; }
.particle:nth-child(4) { left: 65%; animation-duration: 25s; animation-delay: 2s; width: 6px; height: 6px; background: var(--primary-300); }
.particle:nth-child(5) { left: 80%; animation-duration: 19s; animation-delay: 5s; width: 3px; height: 3px; background: var(--accent-400); }
.particle:nth-child(6) { left: 92%; animation-duration: 23s; animation-delay: 8s; }

/* ── App Layout ── */
.app-main {
    padding: 24px 16px 32px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 640px) {
    .app-main { padding: 32px 24px 40px; }
}

@media (min-width: 1024px) {
    .app-main { padding: 40px 32px 48px; }
}

/* ── Utility: Cards ── */
.ui-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    transition: transform var(--duration-normal) var(--ease-out-soft),
                box-shadow var(--duration-normal) var(--ease-out-soft);
}

.ui-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}

/* ── Utility: Buttons ── */
.ui-btn {
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--duration-fast) var(--ease-out-soft),
                box-shadow var(--duration-normal) var(--ease-out-soft),
                background var(--duration-normal) var(--ease-out-soft);
    -webkit-tap-highlight-color: transparent;
}

.ui-btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    color: #fff;
    border: none;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-primary:hover::before {
    transform: translateX(100%);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
    background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.8);
    color: var(--primary-700);
    border: 1.5px solid var(--primary-200);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
}

/* ── Utility: Transition ── */
.ui-transition {
    transition: all var(--duration-normal) var(--ease-out-soft);
}

/* ── Utility: Interactive ── */
.back-btn {
    -webkit-tap-highlight-color: transparent;
}

/* ── Utility: Image Aspect ── */
.media-4x3 {
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

/* ── Hero Section ── */
@keyframes hero-gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes hero-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-8px) rotate(1deg); }
    66% { transform: translateY(4px) rotate(-1deg); }
}

.hero-section {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-2xl);
    background: linear-gradient(-45deg, #4f46e5, #6366f1, #7c3aed, #4f46e5, #3b82f6);
    background-size: 400% 400%;
    animation: hero-gradient 12s ease infinite;
    box-shadow: 0 8px 40px rgba(79, 70, 229, 0.3), 0 0 0 1px rgba(99, 102, 241, 0.2);
}

.hero-dots {
    position: absolute;
    inset: 0;
    opacity: 0.12;
    background-image: radial-gradient(circle at 1px 1px, white 1px, transparent 0);
    background-size: 20px 20px;
}

.hero-glow-1 {
    position: absolute;
    top: -30%;
    right: -20%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    filter: blur(60px);
    animation: hero-float 8s ease-in-out infinite;
}

.hero-glow-2 {
    position: absolute;
    bottom: -25%;
    left: -15%;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: rgba(34, 211, 238, 0.1);
    filter: blur(50px);
    animation: hero-float 10s ease-in-out infinite reverse;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #4ade80;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    margin-top: 16px;
    font-size: clamp(1.75rem, 5vw, 3.5rem);
    font-weight: 900;
    color: #fff;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    margin-top: 16px;
    color: rgba(224, 231, 255, 0.9);
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    line-height: 1.6;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 28px;
}

.hero-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 52px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--duration-normal) var(--ease-out-soft);
    -webkit-tap-highlight-color: transparent;
}

.hero-btn-primary {
    background: #fff;
    color: var(--primary-700);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15), inset 0 -1px 0 rgba(0,0,0,0.05);
}

.hero-btn-primary:hover {
    background: var(--primary-50);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.hero-btn-secondary {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
}

.hero-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

@media (min-width: 768px) {
    .hero-actions {
        flex-direction: row;
    }
}

/* ── Stats Cards ── */
@keyframes count-in {
    from { opacity: 0; transform: translateY(12px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.stat-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.7);
    border-radius: var(--radius-xl);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-out-soft);
    animation: count-in 0.5s var(--ease-out-soft) both;
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-400), var(--accent-400));
    opacity: 0;
    transition: opacity var(--duration-normal);
}

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

.stat-card:hover::after {
    opacity: 1;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }

.stat-icon {
    font-size: 1.5rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--primary-50);
    margin-bottom: 12px;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--slate-900);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--slate-500);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Search Section ── */
.search-section {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(226, 232, 240, 0.7);
    border-radius: var(--radius-2xl);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.search-input-wrap {
    position: relative;
}

.search-input-wrap svg {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--slate-400);
    pointer-events: none;
    transition: color var(--duration-normal);
}

.search-input {
    width: 100%;
    min-height: 56px;
    padding: 16px 16px 16px 48px;
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: var(--font-body);
    background: #fff;
    color: var(--slate-800);
    outline: none;
    transition: border-color var(--duration-normal), box-shadow var(--duration-normal);
}

.search-input:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.search-input:focus + svg,
.search-input:focus ~ svg {
    color: var(--primary-500);
}

.search-input::placeholder {
    color: var(--slate-400);
}

.search-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.search-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.825rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--primary-700);
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    transition: all var(--duration-fast) var(--ease-out-soft);
}

.search-tag:hover {
    background: var(--primary-100);
    border-color: var(--primary-200);
    color: var(--primary-800);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.12);
}

/* ── Master Cards ── */
.master-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius-xl);
    padding: 20px;
    box-shadow: var(--shadow-card);
    transition: all var(--duration-normal) var(--ease-out-soft);
    position: relative;
    overflow: hidden;
}

.master-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-400));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s var(--ease-out-soft);
}

.master-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-100);
}

.master-card:hover::before {
    transform: scaleX(1);
}

.master-avatar {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
    color: var(--primary-700);
    font-weight: 800;
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.master-service-tag {
    display: inline-flex;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--primary-700);
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
}

.master-rating {
    color: #f59e0b;
    font-weight: 700;
}

/* ── Form Styles ── */
.form-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    min-height: 48px;
    padding: 12px 16px;
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: var(--font-body);
    background: #fff;
    color: var(--slate-800);
    outline: none;
    transition: border-color var(--duration-normal), box-shadow var(--duration-normal);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.08);
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: 6px;
}

/* ── Profile Section ── */
.profile-header {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500), var(--accent-600));
    border-radius: var(--radius-2xl);
    padding: 32px 24px;
    color: #fff;
}

.profile-header::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image: radial-gradient(circle at 1px 1px, white 1px, transparent 0);
    background-size: 20px 20px;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    font-weight: 900;
    font-size: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ── AI Estimate ── */
.ai-card {
    position: relative;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-400), var(--primary-500));
    background-size: 200% 100%;
    animation: shimmer-gradient 3s linear infinite;
}

@keyframes shimmer-gradient {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.ai-result {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(6, 182, 212, 0.05));
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-xl);
    padding: 20px;
}

/* ── Skeleton Loading ── */
.skeleton {
    position: relative;
    overflow: hidden;
    background: var(--slate-200);
    border-radius: var(--radius-sm);
}

.skeleton::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    transform: translateX(-100%);
}

@keyframes skeleton-shimmer {
    100% { transform: translateX(100%); }
}

.skeleton-line { border-radius: var(--radius-sm); }

/* ── Fade-in Animation ── */
@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fade-in-up 0.5s var(--ease-out-soft) both;
}

.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.3s; }

/* ── Motion: Reduced ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}