/* ===========================================
   emotag - Apple MacBook Style
   Clean, Minimal, Elegant
   =========================================== */

:root {
    /* Colors - Apple-inspired palette */
    --color-bg: #f5f5f7;
    --color-bg-card: #ffffff;
    --color-bg-secondary: rgba(255, 255, 255, 0.72);
    --color-bg-hover: rgba(0, 0, 0, 0.04);
    --color-primary: #007aff;
    --color-primary-hover: #0056b3;
    --color-secondary: #5856d6;
    --color-accent: #ff9500;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-text-tertiary: #aeaeb2;
    --color-border: rgba(0, 0, 0, 0.1);
    --color-divider: rgba(0, 0, 0, 0.06);
    --color-error: #ff3b30;
    --color-success: #34c759;

    /* Typography - SF Pro style */
    --font-main: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
    --font-kaomoji: 'SF Pro Display', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, Menlo, monospace;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-xxxl: 80px;

    /* Border Radius - Apple uses subtle curves */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 980px;

    /* Transitions - Apple's signature smooth feel */
    --transition-fast: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-normal: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-slow: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);

    /* Shadows - Subtle and layered */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.14), 0 8px 24px rgba(0, 0, 0, 0.08);

    /* Blur */
    --blur-md: saturate(180%) blur(20px);
}

/* ===========================================
   Reset & Base
   =========================================== */

*,
*::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-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.8;
}

::selection {
    background: rgba(0, 122, 255, 0.2);
}

/* ===========================================
   Layout
   =========================================== */

.container {
    width: 100%;
    max-width: 980px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.header {
    text-align: center;
    padding: var(--spacing-xxxl) var(--spacing-lg) var(--spacing-xxl);
}

.header__title {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: normal;
    background: linear-gradient(90deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.header__subtitle {
    font-size: 21px;
    font-weight: 400;
    color: var(--color-text-secondary);
    letter-spacing: 0.011em;
    line-height: 1.381;
}

/* ===========================================
   Search Section
   =========================================== */

.search-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.search-box {
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 680px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.search-box:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.search-box__icon {
    padding-left: var(--spacing-md);
    color: var(--color-text-tertiary);
}

.search-box__input {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    outline: none;
    font-size: 17px;
    font-family: var(--font-main);
    background: transparent;
    color: var(--color-text);
}

.search-box__input::placeholder {
    color: var(--color-text-tertiary);
}

.search-box__btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    color: var(--color-primary);
    border: none;
    cursor: pointer;
    font-size: 17px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.search-box__btn:hover {
    background: var(--color-bg-hover);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

/* ===========================================
   Buttons - Apple Style
   =========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 12px 22px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 17px;
    font-weight: 400;
    font-family: var(--font-main);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

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

.btn--secondary:hover {
    background: #333;
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

.btn--ghost {
    background: var(--color-bg-hover);
    color: var(--color-text);
}

.btn--ghost:hover {
    background: rgba(0, 0, 0, 0.08);
}

.btn--small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn--icon {
    padding: 10px;
    border-radius: var(--radius-md);
}

.btn--link {
    background: none;
    padding: 0;
    color: var(--color-primary);
    font-weight: 400;
}

.btn--link:hover {
    text-decoration: underline;
}

/* ===========================================
   Kaomoji Card - Glass morphism style
   =========================================== */

.kaomoji-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.kaomoji-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-divider);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.kaomoji-card:hover {
    box-shadow: var(--shadow-md);
    transform: scale(1.01);
    border-color: var(--color-border);
}

.kaomoji-card__content {
    flex: 1;
    font-family: var(--font-kaomoji);
    font-size: 28px;
    font-weight: 400;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    word-break: break-all;
    text-align: center;
}

.kaomoji-card__content:hover {
    background: var(--color-bg-hover);
}

.kaomoji-card__content:active {
    background: rgba(0, 0, 0, 0.08);
}

.kaomoji-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.kaomoji-card__actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

/* ===========================================
   Tag Badge - Pill style
   =========================================== */

.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: rgba(0, 122, 255, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(0, 122, 255, 0.2);
}

.tag--removable {
    padding-right: 8px;
}

.tag__remove {
    margin-left: 6px;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.1);
    font-size: 12px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.tag__remove:hover {
    background: rgba(0, 0, 0, 0.2);
}

/* ===========================================
   Input Fields - Apple Style
   =========================================== */

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

.form-group__label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.016em;
}

.form-group__input,
.form-group__textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 17px;
    font-family: var(--font-main);
    background: var(--color-bg-card);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.form-group__input:focus,
.form-group__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.form-group__input--kaomoji {
    font-family: var(--font-kaomoji);
    font-size: 32px;
    text-align: center;
    padding: var(--spacing-lg);
}

.form-group__help {
    margin-top: var(--spacing-sm);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.form-group__error {
    margin-top: var(--spacing-sm);
    font-size: 13px;
    color: var(--color-error);
}

/* Tag Input */
.tag-input {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    min-height: 52px;
    background: var(--color-bg-card);
    cursor: text;
    transition: all var(--transition-fast);
}

.tag-input:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.tag-input__field {
    flex: 1;
    min-width: 120px;
    border: none;
    outline: none;
    padding: 4px 8px;
    font-size: 17px;
    font-family: var(--font-main);
    background: transparent;
}

/* ===========================================
   Modal - Frosted Glass Effect
   =========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal__title {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 0.016em;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.modal__actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.modal__actions .btn {
    flex: 1;
}

/* ===========================================
   Toast Message
   =========================================== */

.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: 14px 20px;
    background: var(--color-text);
    color: white;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: toast-in 0.3s cubic-bezier(0.25, 0.1, 0.25, 1), 
               toast-out 0.3s cubic-bezier(0.25, 0.1, 0.25, 1) 2.7s forwards;
}

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

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

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes toast-out {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
}

/* ===========================================
   Empty State
   =========================================== */

.empty-state {
    text-align: center;
    padding: var(--spacing-xxxl) var(--spacing-lg);
    color: var(--color-text-secondary);
}

.empty-state__icon {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state__title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.empty-state__text {
    font-size: 17px;
    line-height: 1.5;
}

/* ===========================================
   Loading
   =========================================== */

.loading {
    display: flex;
    justify-content: center;
    padding: var(--spacing-xxl);
}

.loading__spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-divider);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===========================================
   Page Specific - Form Page
   =========================================== */

.form-page {
    max-width: 580px;
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.form-page__header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.form-page__title {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.003em;
    margin-bottom: var(--spacing-sm);
}

.form-page__subtitle {
    font-size: 17px;
    color: var(--color-text-secondary);
}

.form-page__back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
    font-size: 17px;
}

.form-page__back:hover {
    opacity: 0.8;
}

.form-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

/* ===========================================
   Responsive
   =========================================== */

@media (max-width: 734px) {
    .header {
        padding: var(--spacing-xxl) var(--spacing-md) var(--spacing-xl);
    }

    .header__title {
        font-size: 40px;
    }

    .header__subtitle {
        font-size: 19px;
    }

    .kaomoji-card {
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
    }

    .kaomoji-card__content {
        font-size: 24px;
    }

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

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

    .action-buttons {
        width: 100%;
    }

    .action-buttons .btn {
        flex: 1;
    }

    .modal {
        width: 95%;
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }

    .form-page {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .form-page__title {
        font-size: 28px;
    }
}

/* ===========================================
   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;
}

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

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

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

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