/* ===========================================
   Zeiterfassung - Kompass für Bildung
   Helles, freundliches Design
   =========================================== */

/* CSS Variables */
:root {
    /* Colors - Helles Theme mit Orange-Akzenten */
    --color-bg: #f8f9fa;
    --color-bg-elevated: #ffffff;
    --color-bg-card: #ffffff;
    --color-bg-input: #f1f3f4;
    
    --color-text: #2d3436;
    --color-text-muted: #636e72;
    --color-text-subtle: #b2bec3;
    
    /* Kompass Orange */
    --color-primary: #e67e22;
    --color-primary-hover: #d35400;
    --color-primary-light: #f39c12;
    --color-primary-muted: rgba(230, 126, 34, 0.12);
    
    --color-success: #27ae60;
    --color-success-muted: rgba(39, 174, 96, 0.12);
    
    --color-warning: #f39c12;
    --color-warning-muted: rgba(243, 156, 18, 0.12);
    
    --color-error: #e74c3c;
    --color-error-muted: rgba(231, 76, 60, 0.12);
    
    --color-border: #e1e5e9;
    --color-border-light: #d1d5db;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Consolas', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

/* Screens */
.screen {
    min-height: 100vh;
    min-height: 100dvh;
}

.screen.hidden {
    display: none;
}

/* ===========================================
   Offline Banner
   =========================================== */
.offline-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-warning);
    color: #fff;
    padding: var(--space-sm) var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform var(--transition-normal);
}

.offline-banner:not(.hidden) {
    transform: translateY(0);
}

.offline-icon {
    font-size: 1rem;
}

/* ===========================================
   Login Screen
   =========================================== */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: linear-gradient(135deg, #fff 0%, var(--color-bg) 100%);
}

.login-container {
    width: 100%;
    max-width: 380px;
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.logo {
    font-size: 3.5rem;
    margin-bottom: var(--space-md);
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.subtitle {
    color: var(--color-primary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Forms */
.login-form,
.entry-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.input-group label .optional {
    font-weight: 400;
    color: var(--color-text-subtle);
}

input[type="text"],
input[type="password"],
input[type="date"],
input[type="time"],
select,
textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-muted);
    background: var(--color-bg-elevated);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-subtle);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23636e72' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.checkbox-group label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-input);
    border-color: var(--color-border-light);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

.btn-loader {
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error & Success Messages */
.error-message,
.success-message {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    text-align: center;
}

.error-message {
    background: var(--color-error-muted);
    color: var(--color-error);
}

.success-message {
    background: var(--color-success-muted);
    color: var(--color-success);
}

.hidden {
    display: none !important;
}

/* ===========================================
   App Header
   =========================================== */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.app-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-name {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ===========================================
   Tab Navigation
   =========================================== */
.tab-nav {
    display: flex;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-md);
}

.tab-btn {
    flex: 1;
    padding: var(--space-md);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text);
    background: var(--color-primary-muted);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ===========================================
   Tab Content
   =========================================== */
.tab-content {
    padding: var(--space-lg);
    max-width: 600px;
    margin: 0 auto;
}

.tab-content.hidden {
    display: none;
}

/* Today View */
.day-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.day-nav {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.day-nav h2 {
    font-size: 1.1rem;
    font-weight: 500;
    min-width: 180px;
    text-align: center;
}

.day-header h2 {
    font-size: 1.1rem;
    font-weight: 500;
}

.day-summary {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    font-family: var(--font-mono);
}

/* Entries List */
.entries-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.entry-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.entry-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border-light);
}

.entry-card.pending {
    border-left: 4px solid var(--color-warning);
}

.entry-card.needs-edit {
    border-left: 4px solid var(--color-error);
    background: var(--color-error-muted);
}

.entry-card.failed {
    border-left: 4px solid var(--color-error);
    opacity: 0.8;
}

.entry-error {
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    background: var(--color-error-muted);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-error);
}

.entry-pending {
    margin-top: var(--space-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.entry-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.entry-time {
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-text);
}

.entry-duration {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    background: var(--color-primary-muted);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
}

.entry-project {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.entry-activity {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.entry-description {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.entry-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.entry-actions .btn {
    flex: 1;
    padding: var(--space-sm);
    font-size: 0.85rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* ===========================================
   Week View
   =========================================== */
.week-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.week-header h2 {
    font-size: 1rem;
    font-weight: 500;
}

.week-summary {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.summary-item {
    flex: 1;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.summary-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

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

.week-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.week-day {
    display: flex;
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.week-day:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.week-day.today {
    border-color: var(--color-primary);
    background: var(--color-primary-muted);
}

.week-day-name {
    width: 80px;
    font-weight: 500;
}

.week-day-date {
    width: 60px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.week-day-bar {
    flex: 1;
    height: 8px;
    background: var(--color-bg-input);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 0 var(--space-md);
}

.week-day-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.week-day-hours {
    width: 50px;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===========================================
   Entry Form
   =========================================== */
.entry-form {
    max-width: 500px;
}

.entry-form h2 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.form-row {
    width: 100%;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.form-actions .btn {
    flex: 1;
}

/* ===========================================
   Sync Status
   =========================================== */
.sync-status {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    padding: var(--space-sm) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.sync-icon {
    animation: spin 1s linear infinite;
}

/* ===========================================
   Toast Notifications
   =========================================== */
.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    z-index: 1000;
}

.toast {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-lg);
    animation: slideIn var(--transition-normal) ease;
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-error);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===========================================
   Responsive
   =========================================== */
@media (max-width: 480px) {
    .app-header {
        padding: var(--space-md);
    }
    
    .tab-content {
        padding: var(--space-md);
    }
    
    .user-name {
        display: none;
    }
    
    .week-day-name {
        width: 40px;
    }
    
    .week-day-date {
        width: 50px;
    }
    
    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
    }
}

/* ===========================================
   Safe Area (für Geräte mit Notch)
   =========================================== */
@supports (padding-top: env(safe-area-inset-top)) {
    .app-header {
        padding-top: calc(var(--space-md) + env(safe-area-inset-top));
    }
    
    .tab-content {
        padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
    }
}