:root {
    /* Primäre Farbpalette - Tiefe und Raffinesse */
    --bg-primary: #0c111d;
    --bg-secondary: #141b2b;
    --accent-primary: #2b6ef0;
    --accent-secondary: #4f8cff;
    --accent-glow: rgba(43, 110, 240, 0.25);
    
    /* Oberflächen */
    --surface-glass: rgba(20, 27, 43, 0.85);
    --surface-elevated: #1e2740;
    --surface-inset: #0a0f1a;
    
    /* Textabstufungen */
    --text-primary: #ffffff;
    --text-secondary: #d7dce4;
    --text-tertiary: #6b7b95;
    --text-inverse: #0c111d;
    
    /* Borders & Effects */
    --border-light: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.4);
    --shadow-accent: 0 8px 20px rgba(43, 110, 240, 0.2);
    
    /* Typografie */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Roboto Mono', monospace;
    
    /* Übergänge */
    --transition-fast: 150ms cubic-bezier(0.2, 0, 0, 1);
    --transition-base: 250ms cubic-bezier(0.2, 0, 0, 1);
    --transition-smooth: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Basis Reset & Globale Stile --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    height: -webkit-fill-available;
}

body {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 100% 0%, rgba(43, 110, 240, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 0% 100%, rgba(43, 110, 240, 0.05) 0%, transparent 50%);
    font-family: var(--font-sans);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
    position: relative;
    padding-bottom: env(safe-area-inset-bottom);
}

/* --- Container mit eleganterer Glas-Oberfläche --- */
.container {
    width: 92%;
    max-width: 480px;
    padding: 48px 24px;
    margin: 20px auto 0;
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-medium);
    border-radius: 32px;
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: var(--transition-base);
}

.container::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 32px;
    padding: 1px;
    background: linear-gradient(145deg, rgba(255,255,255,0.1), rgba(255,255,255,0.02));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

/* --- Typografie mit mehr Charakter --- */
h1 {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 24px;
    position: relative;
    display: inline-block;
    padding: 0 16px;
}

h1::before,
h1::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 1px;
    background: var(--border-medium);
}

h1::before {
    left: -10px;
}

h1::after {
    right: -10px;
}

#altitude {
    font-size: 5rem;
    font-weight: 700;
    font-feature-settings: "tnum";
    font-variant-numeric: tabular-nums;
    color: transparent;
    background: linear-gradient(135deg, #fff 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    line-height: 1.1;
    margin: 8px 0 4px;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px var(--accent-glow);
}

#status {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    padding: 6px 12px;
    background: rgba(255,255,255,0.02);
    border-radius: 5px;
    display: inline-block;
    margin-top: 10px;
}

/* --- Canvas mit elegantem Rand --- */
#altitudeCanvas {
    margin-top: 22px;
    width: 94%;
    height: 200px !important;
    border-radius: 10px;
    background: var(--surface-inset);
    border: 1px solid var(--border-light);
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.4);
    transition: var(--transition-base);
}

#altitudeCanvas:hover {
    border-color: var(--border-medium);
}

/* --- Settings Button mit mehr Raffinesse --- */
#settingsBtn {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-medium);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
    -webkit-tap-highlight-color: transparent;
}

#settingsBtn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

#settingsBtn svg {
    width: 20px;
    height: 20px;
    transition: var(--transition-base);
}

#settingsBtn:hover svg {
    transform: rotate(30deg);
}

/* --- Settings Overlay mit Tiefe --- */
#settingsOverlay {
    position: fixed;
    inset: 0;
    background: rgba(12, 17, 29, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn var(--transition-smooth);
    padding: 16px;
}

.settingsBox {
    width: 100%;
    max-width: 440px;
    background: var(--surface-elevated);
    padding: 40px 32px;
    border-radius: 32px;
    border: 1px solid var(--border-medium);
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-smooth);
    max-height: 90vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.settingsBox h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-top: -5px;
}

/* --- Settings Controls mit mehr Struktur --- */
.setting {
    margin-bottom: 15px;
    text-align: left;
}

.setting label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.offsetRow input,
#historyLength {
    width: 80%;
    background: var(--surface-inset);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 1rem;
    font-family: var(--font-mono);
    outline: none;
    transition: var(--transition-fast);
}

.offsetRow input:focus,
#historyLength:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* --- Buttons mit klarer Hierarchie & Touch-Optimierung --- */
#closeSettings,
#resetOffset {
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 14px;
    padding: 16px 20px;
    font-size: 1rem;
    font-weight: 600;
    width: 100%;
    margin-top: 8px;
    cursor: pointer;
    transition: var(--transition-base);
    letter-spacing: 0.01em;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

#timeRange {
    width: 45%;
}

#autoBtn {
    width: 40%;
    padding: 5px;
    border: none;
    border-radius: 5px;
    background: #38bdf8;
    color: #020617;
    font-weight: bold;
    text-size-adjust: 90%;
    margin-left: 5px;
    height: 10px;
}


#closeSettings {
    background: var(--accent-primary);
    margin-top: 5px;
}

#resetOffset {
    background: #26314e;
    border: 1px solid var(--border-medium);
    color: var(--text-secondary);
}

#autoBtn {
    background: var(--surface-elevated);
    border: 1px solid var(--border-medium);
    color: var(--text-primary);
}

#closeSettings:active,
#resetOffset:active,
#autoBtn:active {
    transform: scale(0.98);
}

#nextFactBtn {
    width: 60%;
    padding: 5px;
    border: none;
    border-radius: 5px;
    background: #38bdf8;
    color: #020617;
    font-weight: bold;
    text-size-adjust: 120%;
    margin-left: 20%;
    margin-top: 15px;
    margin-bottom: 15px;
    display: none;
}

#fun_facts {
    display: none;
    margin-top: -5px;
}

#facts-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 10px;
    margin-bottom: 20px;
}

/* --- Info Container mit mehr Struktur --- */
.infoContainer {
    width: 92%;
    max-width: 480px;
    margin: 20px auto 40px;
    padding: 32px 24px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

#points {
    margin-left: 25px;
}

.infoTable {
    width: 100%;
    margin-top: 24px;
    /* Nutze separate statt collapse für abgerundete Ecken */
    border-collapse: separate; 
    border-spacing: 0;
    
    border: 2px solid var(--border-light);
    border-radius: 16px;
    overflow: hidden; /* Wichtig, damit die Ecken der Zellen nicht überstehen */
}

/* Vertikale Linien zwischen den Spalten */
.infoTable th:not(:last-child), 
.infoTable td:not(:last-child) {
    border-right: 1px solid var(--border-light);
}

.infoTable th {
    background: rgba(255,255,255,0.02);
    color: var(--text-secondary);
    padding: 16px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: left;
}

.infoTable td {
    padding: 16px 12px;
    /* Horizontale Linien */
    border-top: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 0.9375rem;
}


/* --- Utilities mit mehr Finesse --- */
.hidden {
    display: none !important;
}

.status-warning {
    color: #f59e0b;
    background: rgba(245, 158, 11, 0.1);
    padding: 8px 20px;
    border-radius: 5px;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-block;
    border: 1px solid rgba(245, 158, 11, 0.2);
}


@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-4px); }
    40% { transform: translateX(4px); }
    60% { transform: translateX(-2px); }
    80% { transform: translateX(2px); }
}

/* --- Mobile-First Optimierungen --- */
@media (max-width: 480px) {
    .container {
        width: 94%;
        padding: 40px 20px;
        margin-top: 16px;
    }
    
    #altitude {
        font-size: 4.5rem;
    }
    
    .settingsBox {
        padding: 32px 24px;
    }
    
    .infoContainer {
        width: 94%;
        padding: 28px 20px;
    }
    
    button, 
    #settingsBtn {
        min-height: 48px;
    }
}

/* --- Safe Area für moderne Smartphones --- */
@supports (padding: max(0px)) {
    .container,
    .infoContainer {
        padding-left: max(24px, env(safe-area-inset-left));
        padding-right: max(24px, env(safe-area-inset-right));
    }
}

/* --- Dark Mode Optimierung (falls System Dark Mode) --- */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0a0e17;
        --surface-glass: rgba(20, 27, 43, 0.9);
    }
}

/* --- Performance-Optimierungen --- */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* --- Druckoptimierung (Bonus) --- */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .container,
    .infoContainer {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    #settingsBtn {
        display: none;
    }
}

footer {
    margin-bottom: 75px;
    margin-top: -10px !important;
}

.link {
    color: #2952d8;
    text-decoration: underline;
}