/*
 * Baby Sleep Tracker - Styles
 * Methodology: Every Layout + vas-hosting.cz inspiration
 * Clean, typographic, minimal interface
 */

/* ========================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ======================================== */

:root {
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-small: 0.875rem;
    --font-size-base: 1rem;
    --font-size-large: 1.25rem;
    --font-size-xlarge: 1.5rem;
    --font-size-2xlarge: 2rem;
    --font-size-3xlarge: 2.5rem;
    --line-height: 1.6;
    --line-height-tight: 1.3;
    
    /* Spacing - based on modular scale */
    --space-3xs: clamp(0.25rem, 0.23rem + 0.12vw, 0.31rem);
    --space-2xs: clamp(0.5rem, 0.48rem + 0.12vw, 0.56rem);
    --space-xs: clamp(0.75rem, 0.71rem + 0.18vw, 0.88rem);
    --space-s: clamp(1rem, 0.96rem + 0.18vw, 1.13rem);
    --space-m: clamp(1.5rem, 1.43rem + 0.37vw, 1.75rem);
    --space-l: clamp(2rem, 1.91rem + 0.49vw, 2.38rem);
    --space-xl: clamp(3rem, 2.87rem + 0.67vw, 3.5rem);
    --space-2xl: clamp(4rem, 3.83rem + 0.85vw, 4.63rem);
    
    /* Colors - Light mode */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #e9ecef;
    --color-text: #212529;
    --color-text-muted: #6c757d;
    --color-border: #dee2e6;
    --color-primary: #0066cc;
    --color-primary-dark: #004d99;
    --color-success: #28a745;
    --color-warning: #e67e22;
    --color-warning-light: #fff3e0;
    
    /* Button colors */
    --color-btn-sleep: #0066cc;
    --color-btn-sleep-hover: #004d99;
    --color-btn-wake: #e67e22;
    --color-btn-wake-hover: #d35400;
    
    /* Border radius */
    --radius-small: 0.375rem;
    --radius-medium: 0.75rem;
    --radius-large: 1.5rem;
    
    /* Shadows */
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 30px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition: 0.2s ease;
}

/* Dark mode colors */
.dark-mode {
    --color-bg: #1a1d21;
    --color-bg-secondary: #22262b;
    --color-bg-tertiary: #2d3339;
    --color-text: #e9ecef;
    --color-text-muted: #9ca3af;
    --color-border: #3d444d;
    --color-primary: #4da3ff;
    --color-primary-dark: #3d8ce0;
    --color-warning-light: #3d3020;
    
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 10px 30px rgba(0, 0, 0, 0.5);
}


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

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

html {
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition), color var(--transition);
    min-height: 100vh;
    min-height: 100dvh;
}

h1, h2, h3, h4 {
    line-height: var(--line-height-tight);
    font-weight: 600;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}


/* ========================================
   EVERY LAYOUT PRIMITIVES
   ======================================== */

/* Stack - vertical spacing */
.stack {
    display: flex;
    flex-direction: column;
}

.stack > * + * {
    margin-block-start: var(--space-s);
}

.stack[data-space="xs"] > * + * { margin-block-start: var(--space-xs); }
.stack[data-space="s"] > * + * { margin-block-start: var(--space-s); }
.stack[data-space="m"] > * + * { margin-block-start: var(--space-m); }
.stack[data-space="l"] > * + * { margin-block-start: var(--space-l); }

/* Box - padded container */
.box {
    padding: var(--space-s);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-medium);
}

.box[data-padding="s"] { padding: var(--space-xs); }
.box[data-padding="m"] { padding: var(--space-m); }
.box[data-padding="l"] { padding: var(--space-l); }

/* Center - centered container with max-width */
.center {
    box-sizing: content-box;
    max-inline-size: 40rem;
    margin-inline: auto;
    padding-inline: var(--space-s);
}

/* Cluster - horizontal grouping with wrapping */
.cluster {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-s);
    align-items: center;
}

.cluster[data-justify="space-between"] { justify-content: space-between; }
.cluster[data-justify="center"] { justify-content: center; }

/* Switcher - responsive two-column layout */
.switcher {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-s);
}

.switcher > * {
    flex-grow: 1;
    flex-basis: calc((20rem - 100%) * 999);
}

/* Cover - fills viewport with centered content */
.cover {
    display: flex;
    flex-direction: column;
    min-block-size: 100vh;
    min-block-size: 100dvh;
}

.cover > * {
    margin-block: var(--space-s);
}

.cover > :first-child:not(.cover__centered) {
    margin-block-start: 0;
}

.cover > :last-child:not(.cover__centered) {
    margin-block-end: 0;
}

.cover > .cover__centered {
    margin-block: auto;
}


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

/* Header */
.header {
    padding: var(--space-s);
    border-block-end: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__title {
    font-size: var(--font-size-large);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-2xs);
}

.header__toggle {
    padding: var(--space-2xs);
    border-radius: var(--radius-small);
    font-size: var(--font-size-large);
    transition: background-color var(--transition);
}

.header__toggle:hover {
    background-color: var(--color-bg-tertiary);
}

/* Main content */
.main {
    flex: 1;
    padding: var(--space-s);
    display: flex;
    flex-direction: column;
}


/* ========================================
   STATS COMPONENT - Simple text style
   ======================================== */

.stats {
    display: flex;
    justify-content: center;
    gap: var(--space-l);
    margin-block-end: var(--space-s);
    padding-block: var(--space-xs);
    border-block-end: 1px solid var(--color-border);
}

.stats__item {
    text-align: center;
}

.stats__label {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
}

.stats__value {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}


/* ========================================
   STATUS INDICATOR
   ======================================== */

.status {
    text-align: center;
    margin-block-end: var(--space-m);
}

.status__emoji {
    font-size: 4rem;
    margin-block-end: var(--space-xs);
}

.status__text {
    font-size: var(--font-size-xlarge);
    font-weight: 600;
}

.status__text--sleeping {
    color: var(--color-primary);
}

.status__text--awake {
    color: var(--color-warning);
}

.status__time {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    margin-block-start: var(--space-2xs);
}

.status__timer {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-warning);
    margin-block-start: var(--space-2xs);
}


/* ========================================
   MAIN BUTTON
   ======================================== */

.main-button {
    width: 100%;
    text-align: center;
    max-width: 28rem;
    margin-inline: auto;
    padding: var(--space-s) var(--space-s);
    border-radius: var(--radius-large);
    font-size: var(--font-size-xlarge);
    font-weight: 700;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    box-shadow: var(--shadow-large);
    transition: transform var(--transition), box-shadow var(--transition);
}

.main-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

.main-button:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-medium);
}

.main-button--sleep {
    background: linear-gradient(135deg, var(--color-btn-sleep) 0%, var(--color-btn-sleep-hover) 100%);
}

.main-button--wake {
    background: linear-gradient(135deg, var(--color-btn-wake) 0%, var(--color-btn-wake-hover) 100%);
}


/* ========================================
   CONTROL SECTION (centered in viewport)
   ======================================== */

.control {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-block: var(--space-m);
}


/* ========================================
   EVENTS LIST - Simple text style
   ======================================== */

.events {
    margin-block-start: auto;
    padding-block-start: var(--space-m);
    border-block-start: 1px solid var(--color-border);
}

.events__title {
    font-size: var(--font-size-small);
    font-weight: 600;
    margin-block-end: var(--space-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.events__list {
    list-style: none;
}

.events__list > * + * {
    margin-block-start: var(--space-2xs);
}

.event {
    padding: var(--space-2xs) 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-block-end: 1px solid var(--color-border);
}

.event:last-child {
    border-block-end: none;
}

.event__content {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex: 1;
}

.event__emoji {
    font-size: var(--font-size-large);
}

.event__info {
    flex: 1;
}

.event__type {
    font-weight: 500;
    font-size: var(--font-size-base);
}

.event__time {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    margin-block-start: var(--space-3xs);
}

.event__duration {
    font-size: var(--font-size-small);
    color: var(--color-primary);
    font-weight: 600;
    margin-block-start: var(--space-3xs);
}

.event__actions {
    display: flex;
    gap: var(--space-2xs);
}

.event__btn {
    padding: var(--space-2xs) var(--space-xs);
    border-radius: var(--radius-small);
    font-size: var(--font-size-large);
    background-color: var(--color-bg-tertiary);
    transition: background-color var(--transition), transform var(--transition);
}

.event__btn:hover {
    background-color: var(--color-border);
    transform: scale(1.1);
}

.event__btn:active {
    transform: scale(0.95);
}

.event__btn--edit {
    /* Inherits base styles */
}

.event__btn--delete {
    /* Inherits base styles */
}

.events__empty {
    padding: var(--space-m);
    color: var(--color-text-muted);
    font-style: italic;
}


/* ========================================
   DAILY STATS - Simple text style
   ======================================== */

.daily-stats {
    margin-block-start: var(--space-m);
    padding-block-start: var(--space-s);
    border-block-start: 1px solid var(--color-border);
}

.daily-stats__title {
    font-size: var(--font-size-small);
    font-weight: 600;
    margin-block-end: var(--space-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.daily-stats__list {
    list-style: none;
}

.daily-stats__list > * + * {
    margin-block-start: var(--space-3xs);
}

.daily-stats__item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: var(--space-3xs) 0;
}

.daily-stats__date {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
}

.daily-stats__duration {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}


/* ========================================
   MODAL
   ======================================== */

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-s);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal__overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

.dark-mode .modal__overlay {
    background-color: rgba(0, 0, 0, 0.7);
}

.modal__content {
    position: relative;
    background-color: var(--color-bg);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-large);
    max-width: 32rem;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition);
}

.modal.show .modal__content {
    transform: scale(1);
}

.modal__header {
    padding: var(--space-m);
    border-block-end: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal__title {
    font-size: var(--font-size-large);
    font-weight: 600;
}

.modal__close {
    padding: var(--space-2xs);
    border-radius: var(--radius-small);
    font-size: var(--font-size-xlarge);
    color: var(--color-text-muted);
    transition: background-color var(--transition), color var(--transition);
}

.modal__close:hover {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text);
}

.modal__form {
    padding: var(--space-m);
}

.modal__actions {
    display: flex;
    gap: var(--space-xs);
    justify-content: flex-end;
    margin-block-start: var(--space-m);
}


/* ========================================
   FORM ELEMENTS
   ======================================== */

.form-group {
    margin-block-end: var(--space-s);
}

.form-label {
    display: block;
    font-size: var(--font-size-small);
    font-weight: 600;
    margin-block-end: var(--space-2xs);
    color: var(--color-text);
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--space-xs) var(--space-s);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.dark-mode .form-input:focus,
.dark-mode .form-select:focus {
    box-shadow: 0 0 0 3px rgba(77, 163, 255, 0.2);
}

.btn {
    padding: var(--space-xs) var(--space-m);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-small);
    transition: background-color var(--transition), transform var(--transition);
    cursor: pointer;
}

.btn:active {
    transform: scale(0.97);
}

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

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

.btn--secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text);
}

.btn--secondary:hover {
    background-color: var(--color-border);
}


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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.touch-none {
    touch-action: none;
}