/* =========================================================
   DRIVEFLOW | THEME: ASPHALT & NEON-MINT (Dark Mode)
   ========================================================= */

:root {
    --bg-main: #0d1117; /* Tiefes Asphalt-Schwarz */
    --bg-card: #161b22; /* Etwas helleres Grau für die Karten */
    --accent-color: #10b981; /* Leuchtendes Neon-Mint / Smaragd */
    --accent-hover: #059669; /* Dunkleres Grün beim Klicken */
    --text-main: #e6edf3; /* Klares Weiß-Grau */
    --text-muted: #8b949e; /* Gedimmter Text */
    --border-color: #30363d; /* Subtile Linien */
    --error-bg: rgba(220, 38, 38, 0.1);
    --error-text: #f87171;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }

body { background-color: var(--bg-main); color: var(--text-main); padding-bottom: 75px; }
.hidden { display: none !important; }

/* === LOGIN SCREEN === */
.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; padding: 20px; }
.login-container { background-color: var(--bg-card); padding: 40px; border-radius: 16px; width: 100%; max-width: 420px; box-shadow: 0 10px 30px rgba(0,0,0,0.8); border: 1px solid var(--border-color); text-align: center; }
.login-logo { font-size: 50px; margin-bottom: 15px; font-weight: 800; color: var(--accent-color); text-shadow: 0 0 15px rgba(16, 185, 129, 0.3); }
h2 { color: var(--text-main); margin-bottom: 8px; font-weight: 700; }
.subtitle { color: var(--text-muted); margin-bottom: 30px; font-size: 14px; }
.input-group { text-align: left; margin-bottom: 20px; }
.input-group label { display: block; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; color: var(--text-muted); }
.input-group input { width: 100%; padding: 14px; background-color: var(--bg-main); border: 1px solid var(--border-color); border-radius: 10px; font-size: 16px; color: var(--text-main); transition: 0.2s; }
.input-group input:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2); }

/* === BUTTONS === */
.btn { padding: 14px 24px; border: none; border-radius: 10px; font-size: 16px; font-weight: 700; cursor: pointer; transition: 0.2s ease; width: 100%; }
.btn-primary { background-color: var(--accent-color); color: #000; } /* Schwarzer Text auf Neon-Grün */
.btn-primary:active { background-color: var(--accent-hover); transform: scale(0.98); }
.error-message { background: var(--error-bg); color: var(--error-text); padding: 12px; border-radius: 10px; margin-bottom: 20px; font-size: 14px; border: 1px solid var(--error-text); }

/* === APP HEADER === */
.app-header { background-color: var(--bg-card); color: var(--text-main); padding: 18px 25px; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border-color); }
.logo { font-weight: 800; font-size: 20px; color: var(--accent-color); }
.user-profile { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--text-muted); }
.btn-logout { background-color: var(--border-color); border: none; color: var(--text-main); padding: 6px 12px; border-radius: 8px; cursor: pointer; font-size: 12px; }

/* === MAIN CONTENT & CARDS === */
.app-content { padding: 25px; max-width: 900px; margin: 0 auto; }
.section-title { font-size: 20px; margin-bottom: 20px; color: var(--text-main); }
.student-card { background-color: var(--bg-card); border-radius: 14px; padding: 20px; margin-bottom: 20px; border: 1px solid var(--border-color); }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.card-header h3 { font-size: 18px; color: var(--text-main); margin: 0; }
.badge { font-size: 11px; padding: 4px 10px; border-radius: 14px; font-weight: 700; text-transform: uppercase; background-color: rgba(16, 185, 129, 0.15); color: var(--accent-color); border: 1px solid var(--accent-color); }
.card-body { font-size: 15px; color: var(--text-muted); margin-bottom: 20px; line-height: 1.6; }
.card-body strong { color: var(--text-main); }
.last-note { background-color: var(--bg-main); padding: 12px; border-left: 3px solid var(--accent-color); font-size: 14px; margin-top: 8px; border-radius: 4px; }
.card-footer { text-align: right; }
.card-footer .btn { width: auto; } /* Button in der Karte nicht volle Breite */

/* === BOTTOM NAV === */
.bottom-nav { position: fixed; bottom: 0; left: 0; width: 100%; background-color: var(--bg-card); display: flex; justify-content: space-around; padding: 12px 0; border-top: 1px solid var(--border-color); z-index: 100; }
.nav-item { text-decoration: none; color: var(--text-muted); display: flex; flex-direction: column; align-items: center; font-size: 11px; flex: 1; }
.nav-item.active { color: var(--accent-color); font-weight: 700; }
.nav-icon { font-size: 22px; margin-bottom: 4px; opacity: 0.5; }
.nav-item.active .nav-icon { opacity: 1; }