/* ==========================================================================
   Tutscore Academy — main.css
   Global styles + Phase 1 login page.
   ========================================================================== */

:root {
    --color-primary: #1a56db;
    --color-primary-dark: #133d99;
    --color-bg: #f4f6fb;
    --color-card: #ffffff;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-error-bg: #fdecea;
    --color-error-text: #b91c1c;
    --color-info-bg: #eef2ff;
    --color-info-text: #3730a3;
    --radius: 10px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, -apple-system, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h1 {
    margin: 0 0 4px;
    font-size: 22px;
    color: var(--color-primary-dark);
}

.subtitle {
    margin: 0 0 24px;
    color: var(--color-muted);
    font-size: 14px;
}

.tabs {
    display: flex;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e5e7eb;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: #f3f4f6;
    cursor: pointer;
    font-size: 14px;
    color: var(--color-muted);
}

.tab-btn.active {
    background: var(--color-primary);
    color: #fff;
}

.tab-panel { display: none; text-align: left; }
.tab-panel.active { display: block; }

label {
    display: block;
    font-size: 13px;
    margin: 12px 0 4px;
    color: var(--color-muted);
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
}

input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
}

.login-page .btn-primary {
    width: 100%;
    margin-top: 20px;
    padding: 11px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    cursor: pointer;
}

.login-page .btn-primary:hover { background: var(--color-primary-dark); }

.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
    text-align: left;
}

.alert-error   { background: var(--color-error-bg); color: var(--color-error-text); }
.alert-info    { background: var(--color-info-bg); color: var(--color-info-text); }
.alert-success { background: #dcfce7; color: #166534; }