/**
 * LogBook - Apple-Inspired Design System
 * Minimalist, Fast, Productive
 * Optimized for iPhone, iPad, and Mac
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
    /* Colors - Apple System Palette */
    --color-label: rgba(0, 0, 0, 0.85);
    --color-secondary-label: rgba(0, 0, 0, 0.55);
    --color-tertiary-label: rgba(0, 0, 0, 0.25);
    --color-quaternary-label: rgba(0, 0, 0, 0.10);

    --color-fill: rgba(120, 120, 128, 0.20);
    --color-secondary-fill: rgba(120, 120, 128, 0.16);
    --color-tertiary-fill: rgba(118, 118, 128, 0.12);

    --color-background: #FFFFFF;
    --color-secondary-background: #F2F2F7;
    --color-tertiary-background: #FFFFFF;

    --color-grouped-background: #F2F2F7;
    --color-secondary-grouped-background: #FFFFFF;

    /* Semantic Colors */
    --color-blue: #007AFF;
    --color-green: #34C759;
    --color-red: #FF3B30;
    --color-orange: #FF9500;
    --color-yellow: #FFCC00;

    /* Separator */
    --color-separator: rgba(60, 60, 67, 0.29);
    --color-opaque-separator: #C6C6C8;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;

    /* Font Sizes - Apple Scale */
    --font-size-large-title: 34px;
    --font-size-title-1: 28px;
    --font-size-title-2: 22px;
    --font-size-title-3: 20px;
    --font-size-headline: 17px;
    --font-size-body: 17px;
    --font-size-callout: 16px;
    --font-size-subheadline: 15px;
    --font-size-footnote: 13px;
    --font-size-caption-1: 12px;
    --font-size-caption-2: 11px;

    /* Font Weights */
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing - 8pt Grid */
    --spacing-2: 2px;
    --spacing-4: 4px;
    --spacing-8: 8px;
    --spacing-12: 12px;
    --spacing-16: 16px;
    --spacing-20: 20px;
    --spacing-24: 24px;
    --spacing-32: 32px;
    --spacing-40: 40px;
    --spacing-48: 48px;

    /* Border Radius */
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --radius-xlarge: 20px;

    /* Shadows - Subtle Depth */
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-large: 0 10px 15px rgba(0, 0, 0, 0.04), 0 4px 6px rgba(0, 0, 0, 0.05);

    /* Transitions - Smooth & Fast */
    --transition-fast: 150ms cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0.0, 0.2, 1);

    /* Z-Index Scale */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-regular);
    line-height: 1.47;
    color: var(--color-label);
    background-color: var(--color-grouped-background);
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.large-title {
    font-size: var(--font-size-large-title);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.03em;
}

.title-1 {
    font-size: var(--font-size-title-1);
}

.title-2 {
    font-size: var(--font-size-title-2);
}

.title-3 {
    font-size: var(--font-size-title-3);
}

.headline {
    font-size: var(--font-size-headline);
    font-weight: var(--font-weight-semibold);
}

.body {
    font-size: var(--font-size-body);
}

.callout {
    font-size: var(--font-size-callout);
}

.subheadline {
    font-size: var(--font-size-subheadline);
}

.footnote {
    font-size: var(--font-size-footnote);
    color: var(--color-secondary-label);
}

.caption {
    font-size: var(--font-size-caption-1);
    color: var(--color-secondary-label);
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-16);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-24);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-32);
    }
}

/* ============================================
   HEADER - Translucent Blur
   ============================================ */

header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--color-separator);
    transition: background var(--transition-base);
}

header .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
    padding: 0 var(--spacing-16);
}

@media (min-width: 768px) {
    header .header-content {
        height: 64px;
        padding: 0 var(--spacing-24);
    }
}

header .logo {
    font-size: var(--font-size-headline);
    font-weight: var(--font-weight-semibold);
    color: var(--color-label);
    text-decoration: none;
    letter-spacing: -0.02em;
}

header nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-24);
}

header nav a {
    font-size: var(--font-size-subheadline);
    font-weight: var(--font-weight-regular);
    color: var(--color-secondary-label);
    text-decoration: none;
    transition: color var(--transition-fast);
}

header nav a:hover {
    color: var(--color-label);
}

header nav a.active {
    color: var(--color-blue);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   CARDS - Elevated & Clean
   ============================================ */

.card {
    background: var(--color-secondary-grouped-background);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-small);
    overflow: hidden;
    transition: box-shadow var(--transition-base), transform var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-medium);
}

.card-header {
    padding: var(--spacing-16) var(--spacing-20);
    border-bottom: 0.5px solid var(--color-separator);
}

.card-title {
    font-size: var(--font-size-title-3);
    font-weight: var(--font-weight-semibold);
    color: var(--color-label);
}

.card-body {
    padding: var(--spacing-20);
}

.card-footer {
    padding: var(--spacing-16) var(--spacing-20);
    border-top: 0.5px solid var(--color-separator);
    background: var(--color-tertiary-fill);
}

/* ============================================
   BUTTONS - Apple Style
   ============================================ */

button,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 var(--spacing-20);
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

/* Primary Button */
.button-primary,
button[type="submit"]:not(.button-secondary):not(.button-plain) {
    background: var(--color-label);
    color: #FFFFFF;
}

.button-primary:hover {
    background: rgba(0, 0, 0, 0.75);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.button-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-small);
}

/* Secondary Button */
.button-secondary {
    background: var(--color-fill);
    color: var(--color-label);
}

.button-secondary:hover {
    background: var(--color-secondary-fill);
}

/* Destructive Button */
.button-destructive {
    background: var(--color-red);
    color: #FFFFFF;
}

.button-destructive:hover {
    background: #D70015;
}

/* Success Button */
.button-success {
    background: var(--color-green);
    color: #FFFFFF;
}

.button-success:hover {
    background: #248A3D;
}

/* Plain Button */
.button-plain {
    background: transparent;
    color: var(--color-blue);
    padding: 0 var(--spacing-12);
}

.button-plain:hover {
    background: var(--color-tertiary-fill);
}

/* Large Button */
.button-large {
    min-height: 50px;
    font-size: var(--font-size-headline);
    padding: 0 var(--spacing-32);
}

/* ============================================
   FORMS - Clean & Focused
   ============================================ */

.form-group {
    margin-bottom: var(--spacing-20);
}

label {
    display: block;
    margin-bottom: var(--spacing-8);
    font-size: var(--font-size-subheadline);
    font-weight: var(--font-weight-medium);
    color: var(--color-label);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
select,
textarea {
    width: 100%;
    min-height: 44px;
    padding: var(--spacing-12) var(--spacing-16);
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    color: var(--color-label);
    background: var(--color-secondary-grouped-background);
    border: 1px solid var(--color-separator);
    border-radius: var(--radius-small);
    transition: all var(--transition-fast);
    -webkit-appearance: none;
    appearance: none;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

input::placeholder {
    color: var(--color-tertiary-label);
}

textarea {
    min-height: 88px;
    resize: vertical;
}

/* ============================================
   TABLES - Clean Rows
   ============================================ */

.table-container {
    background: var(--color-secondary-grouped-background);
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-small);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--color-tertiary-fill);
}

th {
    padding: var(--spacing-12) var(--spacing-16);
    font-size: var(--font-size-caption-1);
    font-weight: var(--font-weight-semibold);
    text-align: left;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-secondary-label);
    border-bottom: 0.5px solid var(--color-separator);
}

td {
    padding: var(--spacing-16);
    font-size: var(--font-size-body);
    color: var(--color-label);
    border-bottom: 0.5px solid var(--color-separator);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background: var(--color-tertiary-fill);
}

/* ============================================
   BADGES - Status Indicators
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-caption-1);
    font-weight: var(--font-weight-semibold);
    border-radius: 6px;
    line-height: 1;
}

.badge-blue {
    background: rgba(0, 122, 255, 0.1);
    color: var(--color-blue);
}

.badge-green {
    background: rgba(52, 199, 89, 0.1);
    color: var(--color-green);
}

.badge-red {
    background: rgba(255, 59, 48, 0.1);
    color: var(--color-red);
}

.badge-orange {
    background: rgba(255, 149, 0, 0.1);
    color: var(--color-orange);
}

.badge-gray {
    background: var(--color-fill);
    color: var(--color-secondary-label);
}

/* ============================================
   MODALS - Centered & Blurred
   ============================================ */

.modal {
    display: none;
    /* Hidden by default */
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-16);
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    animation: fadeIn var(--transition-base);
}

.modal.active {
    display: flex;
    /* Show when active class added */
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 500px;
    background: var(--color-secondary-grouped-background);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-large);
    animation: slideUp var(--transition-slow);
}

.modal-header {
    padding: var(--spacing-24) var(--spacing-24) var(--spacing-16);
}

.modal-title {
    font-size: var(--font-size-title-2);
    font-weight: var(--font-weight-semibold);
}

.modal-body {
    padding: 0 var(--spacing-24) var(--spacing-24);
}

/* ============================================
   EMPTY STATES
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--spacing-48) var(--spacing-24);
    color: var(--color-secondary-label);
}

.empty-state-title {
    font-size: var(--font-size-title-3);
    font-weight: var(--font-weight-semibold);
    color: var(--color-tertiary-label);
    margin-bottom: var(--spacing-8);
}

/* ============================================
   VISIT CARDS
   ============================================ */

.visit-card {
    background: var(--color-secondary-grouped-background);
    border-radius: var(--radius-medium);
    padding: var(--spacing-20);
    margin-bottom: var(--spacing-16);
    border: 1px solid var(--color-separator);
    transition: all var(--transition-fast);
}

.visit-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.visit-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-12);
}

.visit-name {
    font-size: var(--font-size-headline);
    font-weight: var(--font-weight-semibold);
    color: var(--color-label);
    margin-bottom: var(--spacing-4);
}

.visit-meta,
.visit-time {
    font-size: var(--font-size-subheadline);
    color: var(--color-secondary-label);
}

.visit-cost {
    font-size: var(--font-size-title-2);
    font-weight: var(--font-weight-semibold);
    color: var(--color-label);
    margin-bottom: var(--spacing-16);
}

.visit-actions {
    display: flex;
    gap: var(--spacing-8);
    align-items: center;
}

.badge-paid {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-8) var(--spacing-16);
    background: rgba(52, 199, 89, 0.1);
    color: var(--color-green);
    border-radius: var(--radius-medium);
    font-size: var(--font-size-subheadline);
    font-weight: var(--font-weight-semibold);
}

/* ============================================
   UTILITIES
   ============================================ */

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.mt-8 {
    margin-top: var(--spacing-8);
}

.mt-16 {
    margin-top: var(--spacing-16);
}

.mt-24 {
    margin-top: var(--spacing-24);
}

.mt-32 {
    margin-top: var(--spacing-32);
}

.mb-8 {
    margin-bottom: var(--spacing-8);
}

.mb-16 {
    margin-bottom: var(--spacing-16);
}

.mb-24 {
    margin-bottom: var(--spacing-24);
}

.mb-32 {
    margin-bottom: var(--spacing-32);
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-8 {
    gap: var(--spacing-8);
}

.gap-16 {
    gap: var(--spacing-16);
}

.gap-24 {
    gap: var(--spacing-24);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

/* ============================================
   RESPONSIVE - Mobile First
   ============================================ */

/* iPhone Safe Areas */
@supports (padding: max(0px)) {
    body {
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
    }
}

/* iPad & Desktop */
@media (min-width: 768px) {
    .large-title {
        font-size: 40px;
    }

    .card {
        border-radius: var(--radius-large);
    }
}

/* Desktop Only */
@media (min-width: 1024px) {
    body {
        font-size: 15px;
    }
}

/* Reduce Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   FOCUS VISIBLE - Accessibility
   ============================================ */

*:focus-visible {
    outline: 2px solid var(--color-blue);
    outline-offset: 2px;
}

button:focus-visible,
.button:focus-visible {
    outline-offset: 4px;
}