:root {
    --color-primary: #2e7d32;
    --color-primary-light: #66bb6a;
    --color-primary-dark: #1b5e20;
    --color-accent: #ff9800;
    --color-danger: #d32f2f;
    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-text: #212121;
    --color-text-secondary: #757575;
    --color-border: #e0e0e0;
    --radius: 16px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --font-size-base: 18px;
    --font-size-lg: 22px;
    --font-size-xl: 28px;
    --font-size-sm: 16px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

.app {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    padding: 24px 20px;
    text-align: center;
}

.app-header h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 4px;
}

.subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* Main */
.app-main {
    flex: 1;
    padding: 16px;
}

.hero {
    margin-bottom: 20px;
    text-align: center;
}

.hero-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* Navigation Cards */
.main-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.nav-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px 12px;
    text-decoration: none;
    color: var(--color-text);
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
    text-align: center;
}

.nav-card:active {
    transform: scale(0.97);
}

.nav-card:hover,
.nav-card:focus {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow);
}

.nav-card--alert {
    border-color: var(--color-danger);
    background: #ffebee;
}

.nav-card--alert .nav-title {
    color: var(--color-danger);
}

.nav-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.nav-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: 4px;
}

.nav-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

/* Page Layout */
.page-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.page-header h2 {
    font-size: var(--font-size-xl);
    flex: 1;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-bg);
    border: none;
    font-size: 20px;
    cursor: pointer;
    text-decoration: none;
    color: var(--color-text);
}

/* Cards */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 8px;
}

.card-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: 12px;
}

.card-meta {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn--primary {
    background: var(--color-primary);
    color: white;
}

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

.btn--danger {
    background: var(--color-danger);
    color: white;
}

.btn--danger:hover {
    background: #b71c1c;
}

.btn--outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--font-size-base);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface);
    color: var(--color-text);
    outline: none;
    transition: border-color 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-primary);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* Radio group */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: 2px solid var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.radio-option input {
    width: 24px;
    height: 24px;
    accent-color: var(--color-primary);
}

.radio-option:has(input:checked) {
    border-color: var(--color-primary);
    background: #e8f5e9;
}

/* Slider */
.range-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.range-wrap input[type="range"] {
    flex: 1;
    height: 8px;
    accent-color: var(--color-primary);
}

.range-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    min-width: 40px;
    text-align: center;
}

/* Lists */
.list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Empty state */
.empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-secondary);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* SOS Page */
.sos-page {
    text-align: center;
    padding: 20px 0;
}

.geo-status {
    background: #e8f5e9;
    border: 2px solid var(--color-primary);
    border-radius: 12px;
    padding: 14px 16px;
    margin-bottom: 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.geo-status--error {
    background: #ffebee;
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.geo-status--success {
    background: #e8f5e9;
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.sos-btn {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    font-size: 24px;
    font-weight: 700;
    background: var(--color-danger);
    color: white;
    border: none;
    box-shadow: 0 8px 24px rgba(211, 47, 47, 0.4);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    margin: 20px auto;
}

.sos-btn:active {
    transform: scale(0.95);
    box-shadow: 0 4px 12px rgba(211, 47, 47, 0.4);
}

.sos-info {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    max-width: 300px;
    margin: 0 auto;
}

/* Responsive */
@media (max-width: 360px) {
    .main-nav {
        grid-template-columns: 1fr;
    }
}