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

:root {
    --accent: #4A9EFF;
    --accent-dim: rgba(74, 158, 255, 0.15);
    --bg: #0f0f13;
    --surface: rgba(255, 255, 255, 0.06);
    --surface-hover: rgba(255, 255, 255, 0.10);
    --border: rgba(255, 255, 255, 0.10);
    --text: #f0f0f5;
    --text-muted: rgba(240, 240, 245, 0.45);
    --success: #4AFF8C;
    --danger: #FF4A4A;
    --radius: 18px;
    --radius-sm: 10px;

    --safe-top: env(safe-area-inset-top);
    --safe-bottom: env(safe-area-inset-bottom);
}

html,
body {
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ── Screens ──────────────────────────────────────────────────────────────── */
.screen {
    min-height: 100dvh;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

.hidden {
    display: none !important;
}

/* ── Login ────────────────────────────────────────────────────────────────── */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at 50% 30%, rgba(74, 158, 255, 0.12) 0%, transparent 70%),
        var(--bg);
}

.login-container {
    width: 100%;
    max-width: 340px;
    padding: 0 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.login-container h1 {
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
}

.login-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: -10px;
}

.login-container input {
    width: 100%;
    padding: 14px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem;
    outline: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color 0.2s;
}

.login-container input:focus {
    border-color: var(--accent);
}

.login-container button {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.login-container button:active {
    opacity: 0.8;
}

.error {
    color: var(--danger);
    font-size: 0.85rem;
}

/* ── Main Screen ──────────────────────────────────────────────────────────── */
#main-screen {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: calc(var(--safe-top) + 24px) 20px calc(var(--safe-bottom) + 24px);
    background: radial-gradient(ellipse at 50% -10%, rgba(74, 158, 255, 0.10) 0%, transparent 60%),
        var(--bg);
}

/* ── Hero Card ────────────────────────────────────────────────────────────── */
.hero-card {
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.20), rgba(74, 158, 255, 0.05));
    border: 1px solid rgba(74, 158, 255, 0.35);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    animation: slideDown 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }

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

.hero-card-inner {
    padding: 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.hero-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.3;
}

.hero-note-row {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-top: 4px;
}

.hero-note {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.hero-credits {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.hero-datum {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

#hero-dismiss {
    margin-top: 12px;
    align-self: flex-end;
    padding: 8px 18px;
    background: var(--accent-dim);
    border: 1px solid rgba(74, 158, 255, 0.3);
    border-radius: 20px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

#hero-dismiss:active {
    background: rgba(74, 158, 255, 0.25);
}

/* ── Summary Widget ───────────────────────────────────────────────────────── */
.summary-widget {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    text-align: center;
}

.summary-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.average-value {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    letter-spacing: -1px;
}

.semester-averages {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.semester-chip {
    padding: 5px 12px;
    background: var(--accent-dim);
    border: 1px solid rgba(74, 158, 255, 0.2);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.semester-chip span {
    color: var(--accent);
    font-weight: 600;
}

/* ── Actions ──────────────────────────────────────────────────────────────── */
.actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    flex: 1;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background 0.2s, color 0.2s;
}

.action-btn:active {
    background: var(--surface-hover);
    color: var(--text);
}

/* ── Module List ──────────────────────────────────────────────────────────── */
.modules-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.modules-title {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0 4px;
}

.module-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background 0.15s;
}

.module-card:active {
    background: var(--surface-hover);
}

.module-card.no-grade {
    opacity: 0.4;
}

.module-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    flex: 1;
    line-height: 1.3;
}

.module-semester {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.module-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    flex-shrink: 0;
}

.module-note {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
}

.module-note.gut {
    color: var(--success);
}

.module-note.mittel {
    color: var(--accent);
}

.module-note.schlecht {
    color: var(--danger);
}

.module-note.be {
    color: var(--text-muted);
}

.module-credits {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ── Credits Progress ───────────────────────────────────────────────────── */
.credits-progress {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px;
}

.credits-progress-bar {
    width: 100%;
    height: 10px;
    background: var(--border);
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 8px;
}

.credits-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success), var(--accent));
    width: 0%;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.credits-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

/* ── Semester Groups ─────────────────────────────────────────────────────── */
.semester-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 8px;
}

.semester-group-title {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0 4px;
    margin-top: 28px;
    margin-bottom: 8px;
}

.semester-group:first-child .semester-group-title {
    margin-top: 8px;
}

/* ── Pull Indicator ──────────────────────────────────────────────────────── */
#pull-indicator {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    transform: translateY(-40px);
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
    z-index: 100;
}