/* ============================================================
   style.css — Global Design System for XavfLearn
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
    --primary:       #00d4ff;
    --primary-dark:  #00a8cc;
    --primary-glow:  rgba(0, 212, 255, 0.15);
    --accent:        #7c3aed;
    --success:       #10b981;
    --warning:       #f59e0b;
    --error:         #ef4444;

    --bg:            #060d1a;
    --bg-card:       #0c1526;
    --bg-card-hover: #101d32;
    --bg-input:      #0e1a2e;
    --border:        #1a2a42;
    --border-hover:  #243a58;

    --text:          #e2e8f0;
    --text-muted:    #64748b;
    --text-faint:    #2d3f57;

    --radius-sm:  0.375rem;
    --radius-md:  0.625rem;
    --radius-lg:  1rem;
    --radius-xl:  1.25rem;

    --shadow:      0 4px 24px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 50px rgba(0, 212, 255, 0.08);
    --transition:  all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: opacity 0.15s; }
a:hover { opacity: 0.8; }

/* ============================================================
   AUTH PAGES
   ============================================================ */
.auth-wrapper {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 2rem;
    background:
        radial-gradient(ellipse 90% 50% at 50% -5%, rgba(0,212,255,0.06) 0%, transparent 65%),
        radial-gradient(ellipse 60% 40% at 90% 90%, rgba(124,58,237,0.04) 0%, transparent 60%),
        var(--bg);
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow), var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary) 40%, var(--accent) 70%, transparent 100%);
}

.auth-logo { text-align: center; margin-bottom: 2rem; }

.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2.5px;
    background: linear-gradient(135deg, var(--primary), #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.35rem;
}

.auth-logo p { color: var(--text-muted); font-size: 0.875rem; }

/* --- Form --- */
.form-group { margin-bottom: 1.1rem; }

.form-group label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 0.45rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background: #0a172a;
}

.form-group input::placeholder { color: var(--text-faint); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #060d1a;
    width: 100%;
    letter-spacing: 0.2px;
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.22);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(0, 212, 255, 0.38);
    opacity: 1;
}

.btn-primary:active { transform: translateY(0); }

.btn-primary:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* --- Alerts --- */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-bottom: 1.1rem;
    display: none;
    font-weight: 500;
    line-height: 1.5;
}

.alert.show { display: block; }

.alert-error {
    background: rgba(239,68,68,0.07);
    border: 1px solid rgba(239,68,68,0.25);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16,185,129,0.07);
    border: 1px solid rgba(16,185,129,0.25);
    color: #6ee7b7;
}

/* --- Auth footer --- */
.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.auth-footer a { font-weight: 600; color: var(--primary); }

.divider { border: none; border-top: 1px solid var(--border); margin: 1.4rem 0; }