/* ============================================
   Android App Showcase - Main Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    /* Light Theme */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f5f5f5;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #666666;
    --color-border: #e0e0e0;
    --color-accent: #2196F3;
    --color-accent-hover: #1976D2;
    --color-success: #4CAF50;
    --color-error: #f44336;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg-primary: #1a1a1a;
    --color-bg-secondary: #2d2d2d;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-border: #404040;
    --color-accent: #64B5F6;
    --color-accent-hover: #42A5F5;
}

/* ============================================
   Global Styles
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ============================================
   Navigation Bar
   ============================================ */

.navbar {
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar__brand {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.navbar__logo {
    width: 300px;
    height: 100px;
    border-radius: var(--radius-md);
    object-fit: contain;
}

.navbar__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
}

.navbar__controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

/* ============================================
   Theme Toggle
   ============================================ */

.theme-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--color-border);
}

.theme-toggle__icon {
    display: inline-block;
    transition: transform var(--transition-normal);
}

.theme-toggle:active .theme-toggle__icon {
    transform: rotate(20deg);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.hero__container {
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero__description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero__cta {
    background-color: white;
    color: var(--color-accent);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.hero__cta:active {
    transform: translateY(0);
}

/* ============================================
   Apps Section
   ============================================ */

.apps-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-bg-primary);
}

.apps-section__container {
    max-width: 1200px;
    margin: 0 auto;
}

.apps-section__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* ============================================
   Carousel
   ============================================ */

.carousel {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.carousel__slides {
    display: flex;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background-color: var(--color-bg-secondary);
    max-width: 100%;
    touch-action: pan-y;
}

.carousel__slide {
    min-width: 100%;
    opacity: 0;
    transition: opacity var(--transition-normal);
    padding: var(--spacing-lg);
    max-width: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
}

.carousel__slide.active {
    opacity: 1;
}

.carousel__control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-lg);
    transition: background-color var(--transition-fast);
    z-index: 10;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.carousel__control:hover {
    background-color: rgba(0, 0, 0, 0.7);
}

.carousel__control:active {
    background-color: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(0.95);
}

.carousel__control--prev {
    left: var(--spacing-md);
}

.carousel__control--next {
    right: var(--spacing-md);
}

.carousel__dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.carousel__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background-color: var(--color-border);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel__dot::before {
    content: '';
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-border);
    transition: background-color var(--transition-fast);
}

.carousel__dot.active::before {
    background-color: var(--color-accent);
}

/* ============================================
   App Card
   ============================================ */

.app-card {
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    max-width: 425px;
    overflow: visible;
    width: 100%;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.app-card__table {
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
}

.app-card__row {
    text-align: center;
    padding: var(--spacing-sm) 0;
}

.app-card__row--icon {
    padding: var(--spacing-md) 0;
}

.app-card__row--title {
    padding: var(--spacing-sm) 0;
}

.app-card__row--category {
    padding: var(--spacing-xs) 0;
}

.app-card__row--description {
    padding: var(--spacing-sm) 0;
}

.app-card__row--screenshots {
    padding: var(--spacing-md) 0;
}

.app-card__row--button {
    padding: var(--spacing-md) 0;
}

.app-card__header {
    display: none;
}

.app-card__icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    object-fit: cover;
    flex-shrink: 0;
}

.app-card__icon--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background-color: var(--color-bg-secondary);
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    margin: 0 auto;
}

.app-card__header-content {
    display: none;
}

.app-card__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
    line-height: 1.3;
    text-align: center;
}

.app-card__description {
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
    font-size: var(--font-size-base);
    text-align: center;
}

.app-card__category {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    margin: 0;
}

.app-card__screenshots-section {
    margin: 0;
    width: 100%;
    display: flex;
    justify-content: center;
}

.app-card__screenshots-title {
    display: none;
}

.app-card__screenshots-grid {
    display: grid;
    grid-template-columns: repeat(4, 80px);
    gap: var(--spacing-sm);
    width: fit-content;
}

.app-card__screenshot-thumb {
    width: 80px;
    height: 120px;
    border-radius: var(--radius-md);
    object-fit: cover;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    border: 2px solid var(--color-border);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.app-card__screenshot-thumb:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.app-card__screenshot-thumb:active {
    transform: scale(1.02);
}

.app-screenshots {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    width: 0 !important;
    overflow: hidden !important;
}

.app-card__actions {
    display: none;
}

.app-card__btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    white-space: nowrap;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-card__btn:active {
    transform: scale(0.98);
}

.app-card__btn--download {
    background-color: var(--color-success);
    color: white;
}

.app-card__btn--download:hover {
    background-color: #45a049;
}

.app-card__btn--preview {
    background-color: var(--color-accent);
    color: white;
}

.app-card__btn--preview:hover {
    background-color: var(--color-accent-hover);
}

.app-card__btn--download {
    background-color: var(--color-success);
    color: white;
}

.app-card__btn--download:hover {
    background-color: #45a049;
}

/* ============================================
   Lightbox
   ============================================ */

.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
}

.lightbox__container {
    position: relative;
    z-index: 1001;
    max-width: 90%;
    max-height: 90vh;
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.lightbox__close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--color-text-primary);
    z-index: 1002;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.lightbox__close:hover {
    background-color: var(--color-bg-secondary);
}

.lightbox__content {
    padding: var(--spacing-lg);
    text-align: center;
}

.lightbox__image {
    max-width: 100%;
    max-height: 60vh;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.lightbox__caption {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.lightbox__controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.lightbox__btn {
    background-color: var(--color-accent);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-base);
    transition: background-color var(--transition-fast);
}

.lightbox__btn:hover {
    background-color: var(--color-accent-hover);
}

/* ============================================
   Contact Section
   ============================================ */

.contact-section {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(33, 150, 243, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(33, 150, 243, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.contact-section__container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.contact-header__content {
    position: relative;
    z-index: 2;
}

.contact-header__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-header__icon {
    font-size: var(--font-size-2xl);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.contact-header__description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.contact-header__toggle {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 50px;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0 auto;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
    position: relative;
    overflow: hidden;
}

.contact-header__toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.contact-header__toggle:hover::before {
    left: 100%;
}

.contact-header__toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.4);
}

.contact-toggle__icon {
    transition: transform var(--transition-normal);
}

.contact-header__toggle[aria-expanded="true"] .contact-toggle__icon {
    transform: rotate(180deg);
}

.contact-header__toggle[aria-expanded="true"] .contact-toggle__text::after {
    content: ' ↑';
}

.contact-header__decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    opacity: 0.1;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    width: 200px;
    height: 200px;
}

.tech-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: techPulse 2s infinite;
}

.tech-dot:nth-child(1) { animation: techPulse 2s infinite, float 4s infinite; }
.tech-dot:nth-child(2) { animation: techPulse 2s infinite 0.3s, float 4s infinite 0.5s; }
.tech-dot:nth-child(3) { animation: techPulse 2s infinite 0.6s, float 4s infinite 1s; }
.tech-dot:nth-child(4) { animation: techPulse 2s infinite 0.9s, float 4s infinite 1.5s; }
.tech-dot:nth-child(5) { animation: techPulse 2s infinite 1.2s, float 4s infinite 2s; }
.tech-dot:nth-child(6) { animation: techPulse 2s infinite 1.5s, float 4s infinite 2.5s; }

@keyframes techPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.contact-form-wrapper {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease-in-out;
    opacity: 0;
}

.contact-form-wrapper.expanded {
    max-height: 1200px;
    opacity: 1;
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

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

.form-group__label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.form-label__icon {
    font-size: var(--font-size-base);
}

.form-group__input,
.form-group__textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    transition: all var(--transition-normal);
    position: relative;
}

.form-group__input:hover,
.form-group__textarea:hover {
    border-color: rgba(33, 150, 243, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.form-group__input:focus,
.form-group__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.form-group__input::placeholder,
.form-group__textarea::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.7;
}

.form-group__error {
    display: block;
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.contact-form__submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.contact-form__submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.3);
}

.contact-form__submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.submit-btn__loading {
    display: none;
    animation: spin 1s linear infinite;
}

.contact-form__submit.loading .submit-btn__icon {
    display: none;
}

.contact-form__submit.loading .submit-btn__loading {
    display: block;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.contact-form__message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    display: none;
}

.contact-form__message.success {
    display: block;
    background: rgba(76, 175, 80, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.contact-form__message.error {
    display: block;
    background: rgba(244, 67, 54, 0.1);
    color: var(--color-error);
    border: 1px solid rgba(244, 67, 54, 0.3);
}

.contact-form__message.info {
    display: block;
    background: rgba(33, 150, 243, 0.1);
    color: var(--color-accent);
    border: 1px solid rgba(33, 150, 243, 0.3);
}

/* ============================================
   Form Styles (Legacy - kept for admin compatibility)
   ============================================ */

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

.form-group__label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.form-group__input,
.form-group__textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: border-color var(--transition-fast);
}

.form-group__input:focus,
.form-group__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-group__input.error,
.form-group__textarea.error {
    border-color: var(--color-error);
}

.form-group__error {
    display: block;
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* Legacy contact form styles - will be overridden by new contact section styles */
.contact-form {
    background-color: var(--color-bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form__submit {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.contact-form__submit:hover {
    background-color: var(--color-accent-hover);
}

.contact-form__submit:disabled {
    background-color: var(--color-border);
    cursor: not-allowed;
}

.contact-form__message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    display: none;
}

.contact-form__message.success {
    display: block;
    background-color: #c8e6c9;
    color: #2e7d32;
    border: 1px solid #81c784;
}

.contact-form__message.error {
    display: block;
    background-color: #ffcdd2;
    color: #c62828;
    border: 1px solid #ef5350;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
}

.footer__container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer__text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer__link {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-accent-hover);
}

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

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

.empty-state__text {
    font-size: var(--font-size-lg);
}

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

/* Mobile (375px) */
@media (max-width: 480px) {
    :root {
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.5rem;
        --spacing-xl: 1.5rem;
        --spacing-lg: 1rem;
        --spacing-md: 0.75rem;
    }
    
    .navbar__container {
        padding: var(--spacing-sm);
    }
    
    .navbar__container .navbar__brand .navbar__logo {
        width: 240px !important;
        height: 80px !important;
    }
    
    .navbar__title {
        font-size: var(--font-size-lg);
    }
    
    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .hero__description {
        font-size: var(--font-size-base);
    }
    
    .hero__cta {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .apps-section {
        padding: var(--spacing-lg) var(--spacing-xs);
    }
    
    .apps-section__title {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-md);
    }
    
    .carousel__control {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-base);
    }
    
    .carousel__control--prev {
        left: var(--spacing-xs);
    }
    
    .carousel__control--next {
        right: var(--spacing-xs);
    }
    
    .carousel__slide {
        padding: var(--spacing-sm);
    }
    
    .app-card {
        max-width: 100%;
        padding: var(--spacing-md);
        margin: 0 auto;
    }
    
    .app-card__table {
        width: 100%;
    }
    
    .app-card__icon {
        width: 60px;
        height: 60px;
    }
    
    .app-card__icon--placeholder {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .app-card__title {
        font-size: var(--font-size-lg);
    }
    
    .app-card__description {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    .app-card__category {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }
    
    .app-card__screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xs);
        max-width: 200px;
        margin: 0 auto;
    }
    
    .app-card__screenshot-thumb {
        width: 100%;
        height: 120px;
    }
    
    .app-card__btn {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    .lightbox__container {
        max-width: 95%;
        margin: var(--spacing-sm);
    }
    
    .lightbox__image {
        max-height: 50vh;
    }
    
    .contact-section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .contact-header__title {
        font-size: var(--font-size-xl);
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .contact-header__description {
        font-size: var(--font-size-base);
    }
    
    .contact-header__toggle {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
        min-height: 44px;
        min-width: 200px;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .tech-grid {
        width: 150px;
        height: 150px;
        gap: var(--spacing-md);
    }
    
    .tech-dot {
        width: 15px;
        height: 15px;
    }
    
    .contact-form {
        padding: var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .form-group {
        margin-bottom: var(--spacing-md);
    }
    
    .form-group__input,
    .form-group__textarea {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    .contact-form__submit {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .contact-section__title {
        font-size: var(--font-size-xl);
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .footer {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .footer__links {
        gap: var(--spacing-md);
        flex-direction: column;
    }
}

/* Small Mobile (320px) */
@media (max-width: 360px) {
    .app-card {
        padding: var(--spacing-sm);
    }
    
    .app-card__icon {
        width: 50px;
        height: 50px;
    }
    
    .app-card__icon--placeholder {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .app-card__title {
        font-size: var(--font-size-base);
    }
    
    .app-card__screenshots-grid {
        grid-template-columns: repeat(2, 80px);
        max-width: 180px;
    }
    
    .app-card__screenshot-thumb {
        width: 80px;
        height: 100px;
    }
    
    .hero__title {
        font-size: var(--font-size-xl);
    }
    
    .navbar__container .navbar__brand .navbar__logo {
        width: 210px !important;
        height: 70px !important;
    }
    
    .navbar__title {
        font-size: var(--font-size-base);
    }
}

/* Tablet (768px) */
@media (min-width: 481px) and (max-width: 1024px) {
    .navbar__container .navbar__brand .navbar__logo {
        width: 270px !important;
        height: 90px !important;
    }
    
    .app-card {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .carousel__slide {
        padding: var(--spacing-md);
    }
    
    .app-card__screenshots-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: 300px;
    }
    
    .hero__title {
        font-size: 2.25rem;
    }
    
    .contact-section__container {
        max-width: 500px;
    }
}

/* Desktop (1920px) */
@media (min-width: 1025px) {
    .app-card {
        max-width: 450px;
    }
    
    .carousel__slide {
        padding: var(--spacing-xl);
    }
    
    .hero__container {
        max-width: 900px;
    }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
    }
}