/* =============================================================================
   ESTUDIX — Base CSS
   Reset, variáveis (protótipo aprovado), tipografia, layout
   ============================================================================= */

/* --- Reset --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* --- Variáveis CSS (dark theme — protótipo aprovado) --- */
:root {
    /* Backgrounds */
    --bg: #003366;
    --bg2: #0A3D6E;
    --surface: #0D3F72;
    --card: #002244;
    --card-hover: #002B55;

    /* Texto */
    --text: #FFFFFF;
    --text2: #FFFFFF;
    --muted: rgba(255, 255, 255, 0.68);

    /* Brand */
    --blue: #38BDF8;
    --blue-dim: rgba(56, 189, 248, 0.12);
    --green: #10B981;
    --green-dim: rgba(16, 185, 129, 0.10);
    --cyan: #22D3EE;

    /* Gradientes */
    --gradient: linear-gradient(135deg, #2563EB, #38BDF8);
    --gradient2: linear-gradient(135deg, #10B981, #38BDF8);

    /* Status */
    --error: #EF4444;
    --error-dim: rgba(239, 68, 68, 0.10);
    --warning: #F59E0B;

    /* Bordas */
    --border: #1E293B;

    /* Raios */
    --r: 16px;
    --r2: 20px;

    /* Tipografia */
    --font: 'DM Sans', system-ui, sans-serif;
    --mono: 'JetBrains Mono', monospace;

    /* Espaçamento */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Nav */
    --nav-h: 68px;
}

/* --- Light theme --- */
[data-theme="light"] {
    --bg: #F8FAFC;
    --bg2: #F1F5F9;
    --surface: #E2E8F0;
    --card: #FFFFFF;
    --card-hover: #F8FAFC;

    --text: #0F172A;
    --text2: #334155;
    --muted: #64748B;

    --blue: #2563EB;
    --blue-dim: rgba(37, 99, 235, 0.08);
    --green: #059669;
    --green-dim: rgba(5, 150, 105, 0.08);
    --cyan: #0891B2;

    --error: #DC2626;
    --error-dim: rgba(220, 38, 38, 0.08);
    --warning: #D97706;

    --border: #E2E8F0;
}

/* --- Base --- */
html {
    font-size: 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- Tipografia --- */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p {
    color: var(--text2);
}

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

a:hover {
    color: var(--cyan);
}

/* --- Layout principal --- */
.main-content {
    padding-bottom: var(--nav-h);
}

.app-container {
    max-width: 430px;
    margin: 0 auto;
    padding: 0 20px 32px;
}

.page-container {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-lg) 20px;
}

/* --- Desktop: expand containers --- */
@media (min-width: 768px) {
    .app-container {
        max-width: 720px;
    }

    .page-container {
        max-width: 720px;
    }
}

@media (min-width: 1024px) {
    .app-container {
        max-width: 960px;
        padding: 0 32px 32px;
    }

    .page-container {
        max-width: 960px;
        padding: var(--space-lg) 32px;
    }

    .page-title {
        font-size: 30px;
    }
}

@media (min-width: 1280px) {
    .app-container {
        max-width: 1100px;
    }

    .page-container {
        max-width: 1100px;
    }
}

/* --- Form inputs --- */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text2);
    margin-bottom: var(--space-xs);
}

.form-input {
    width: 100%;
    padding: 14px var(--space-md);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--text);
    font-family: var(--font);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--blue);
}

.form-input::placeholder {
    color: var(--muted);
}

select.form-input {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}

.has-error .form-input {
    border-color: var(--error);
}

.password-wrapper {
    position: relative;
}

.password-wrapper .form-input {
    padding-right: 48px;
}

.password-toggle {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--muted);
    cursor: pointer;
    padding: 4px;
    font-size: 18px;
    line-height: 1;
    display: flex;
    align-items: center;
}

.password-toggle:hover {
    color: var(--text2);
}

.form-error {
    display: block;
    font-size: 0.8rem;
    color: var(--error);
    margin-top: var(--space-xs);
}

.form-help {
    display: block;
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: var(--space-xs);
}

.form-errors {
    background: var(--error-dim);
    border-radius: 14px;
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-md);
}

/* --- Page headers --- */
.page-header {
    padding-top: 28px;
    margin-bottom: var(--space-lg);
}

.page-title {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.15;
    margin-bottom: 6px;
}

.section-header {
    margin-top: var(--space-lg);
    margin-bottom: 12px;
}

.section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.subtitle {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 24px;
}

/* --- Utilities --- */
.text-muted {
    color: var(--muted);
}

.text-accent {
    color: var(--blue);
}

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

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

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 4px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

/* --- Animations --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp 0.4s ease both;
}

.delay-1 { animation-delay: 0.06s; }
.delay-2 { animation-delay: 0.12s; }
.delay-3 { animation-delay: 0.18s; }
.delay-4 { animation-delay: 0.24s; }
.delay-5 { animation-delay: 0.30s; }
.delay-6 { animation-delay: 0.36s; }