/**
 * ShareKaroo - CSS Design System
 * 
 * A modern, premium design system with:
 * - Dark/Light mode support
 * - CSS custom properties
 * - Responsive layout
 * - Smooth animations
 */

/* ============================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */

:root {
    /* Colors - Light Mode */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #e8e8ed;
    --color-bg-card: #ffffff;
    --color-bg-overlay: rgba(0, 0, 0, 0.5);

    --color-text-primary: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    --color-text-inverse: #ffffff;

    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-accent-light: rgba(0, 113, 227, 0.1);

    --color-success: #30d158;
    --color-warning: #ff9f0a;
    --color-error: #ff453a;

    --color-border: rgba(0, 0, 0, 0.1);
    --color-border-light: rgba(0, 0, 0, 0.05);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.16);

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-modal-top: 350;
    /* For modals that need to appear above other modals */
    --z-toast: 400;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg-primary: #0a0a0a;
        --color-bg-secondary: #141414;
        --color-bg-tertiary: #1f1f1f;
        --color-bg-card: #1a1a1a;
        --color-bg-overlay: rgba(0, 0, 0, 0.75);

        --color-text-primary: #f5f5f7;
        --color-text-secondary: #a1a1a6;
        --color-text-tertiary: #6e6e73;
        --color-text-inverse: #1d1d1f;

        --color-accent: #0a84ff;
        --color-accent-hover: #409cff;
        --color-accent-light: rgba(10, 132, 255, 0.15);

        --color-border: rgba(255, 255, 255, 0.1);
        --color-border-light: rgba(255, 255, 255, 0.05);

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
        --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.5);
    }
}

/* Manual Dark Mode */
[data-theme="dark"] {
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #141414;
    --color-bg-tertiary: #1f1f1f;
    --color-bg-card: #1a1a1a;
    --color-bg-overlay: rgba(0, 0, 0, 0.75);

    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #6e6e73;
    --color-text-inverse: #1d1d1f;

    --color-accent: #0a84ff;
    --color-accent-hover: #409cff;
    --color-accent-light: rgba(10, 132, 255, 0.15);

    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.5);
}

/* ============================================
   BASE STYLES
   ============================================ */

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.02em;
}

.header-actions {
    display: flex;
    gap: var(--space-2);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
}

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

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

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    border-radius: var(--radius-full);
    color: white;
    box-shadow: 0 2px 10px rgba(10, 132, 255, 0.25);
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(10, 132, 255, 0.35);
}

.btn-icon svg {
    width: 16px;
    height: 16px;
    color: white;
}

.text-btn {
    background: none;
    border: none;
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

/* Theme Toggle Icons */
#theme-toggle .sun-icon {
    display: none;
}

#theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] #theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] #theme-toggle .moon-icon {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) #theme-toggle .sun-icon {
        display: block;
    }

    :root:not([data-theme="light"]) #theme-toggle .moon-icon {
        display: none;
    }
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.screen {
    display: none;
    flex-direction: column;
    flex: 1;
    padding: var(--space-6);
    animation: fadeIn var(--transition-base);
}

.screen.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* ============================================
   LANDING SCREEN
   ============================================ */

.screen-landing {
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-10);
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.landing-content {
    max-width: 400px;
}

.landing-animation {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto var(--space-8);
}

.pulse-ring {
    position: absolute;
    inset: 0;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-full);
    opacity: 0;
    animation: pulse 3s ease-out infinite;
}

.pulse-ring.delay-1 {
    animation-delay: 1s;
}

.pulse-ring.delay-2 {
    animation-delay: 2s;
}

@keyframes pulse {
    0% {
        transform: scale(0.5);
        opacity: 0.8;
    }

    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.device-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    color: var(--color-accent);
}

.device-icon svg {
    width: 100%;
    height: 100%;
}

.landing-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.landing-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-6);
}

.landing-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-warning);
    border-radius: var(--radius-full);
    animation: blink 1s ease-in-out infinite;
}

.landing-status.connected::before {
    background: var(--color-success);
    animation: none;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

.device-info {
    margin-top: var(--space-4);
}

.device-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.device-badge svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   DEVICE DISCOVERY SCREEN
   ============================================ */

.screen-discovery {
    padding: var(--space-6);
    gap: var(--space-6);
}

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

.discovery-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.discovery-subtitle {
    color: var(--color-text-secondary);
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 130px));
    gap: var(--space-5);
    padding: var(--space-4) 0;
    justify-content: center;
}

/* ============================================
   PROFESSIONAL DEVICE CARDS
   ============================================ */

.device-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    width: 130px;
    min-height: 140px;
    overflow: visible;
}

/* Subtle glow on card */
.device-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(10, 132, 255, 0.5), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.device-card:hover::before {
    opacity: 1;
}

.device-card:hover {
    background: rgba(10, 132, 255, 0.08);
    border-color: rgba(10, 132, 255, 0.3);
    transform: translateY(-4px);
    box-shadow:
        0 10px 40px rgba(10, 132, 255, 0.15),
        0 0 0 1px rgba(10, 132, 255, 0.1);
}

.device-card.selected {
    background: rgba(48, 209, 88, 0.1);
    border-color: rgba(48, 209, 88, 0.4);
    box-shadow:
        0 10px 40px rgba(48, 209, 88, 0.2),
        0 0 0 1px rgba(48, 209, 88, 0.2);
}

/* Device Icon Container */
.device-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.15), rgba(10, 132, 255, 0.05));
    border: 1.5px solid rgba(10, 132, 255, 0.3);
    border-radius: var(--radius-full);
    color: var(--color-accent);
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Animated ring around icon */
.device-card-icon::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(10, 132, 255, 0.2);
    animation: pulseRing 2.5s ease-out infinite;
}

@keyframes pulseRing {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.6;
    }

    50% {
        transform: scale(1.15);
        opacity: 0;
    }
}

.device-card-icon svg {
    width: 24px;
    height: 24px;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.device-card:hover .device-card-icon {
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.25), rgba(10, 132, 255, 0.1));
    border-color: rgba(10, 132, 255, 0.5);
    transform: scale(1.05);
}

.device-card:hover .device-card-icon svg {
    transform: scale(1.1);
}

.device-card.selected .device-card-icon {
    background: linear-gradient(135deg, rgba(48, 209, 88, 0.25), rgba(48, 209, 88, 0.1));
    border-color: rgba(48, 209, 88, 0.5);
    color: var(--color-success);
}

.device-card.selected .device-card-icon::after {
    border-color: rgba(48, 209, 88, 0.3);
}

/* Device Name - Highly Visible */
.device-card-name {
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
    letter-spacing: -0.01em;
    margin-top: var(--space-2);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .device-card-name,
:root:not([data-theme="dark"]) .device-card-name {
    color: var(--color-text-primary);
    text-shadow: none;
}

.device-card.selected .device-card-name {
    color: var(--color-success);
}

/* Device Type Badge */
.device-card-type {
    font-size: 10px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.7;
}

/* No devices placeholder */
.no-devices {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-12);
    color: var(--color-text-tertiary);
    text-align: center;
}

.no-devices svg {
    width: 80px;
    height: 80px;
    opacity: 0.3;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* ============================================
   DROP ZONE
   ============================================ */

.drop-zone {
    margin-top: auto;
    padding: var(--space-8);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    background: var(--color-bg-secondary);
}

.drop-zone.active {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-text-secondary);
}

.drop-zone-content svg {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

.drop-zone-content p {
    font-size: var(--font-size-base);
}

.drop-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* ============================================
   TRANSFER SCREEN
   ============================================ */

.screen-transfer {
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
}

.transfer-card {
    width: 100%;
    max-width: 400px;
    padding: var(--space-8);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.transfer-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.transfer-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-light);
    border-radius: var(--radius-lg);
    color: var(--color-accent);
}

.transfer-icon svg {
    width: 28px;
    height: 28px;
}

.transfer-icon .receiving-icon {
    display: none;
}

.transfer-icon.receiving .sending-icon {
    display: none;
}

.transfer-icon.receiving .receiving-icon {
    display: block;
}

.transfer-info h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.transfer-info p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.file-preview {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
}

.file-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
}

.file-icon svg {
    width: 24px;
    height: 24px;
}

.file-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

/* Progress Bar */
.progress-container {
    margin-bottom: var(--space-6);
}

.progress-bar {
    height: 8px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-2);
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-success));
    border-radius: var(--radius-full);
    transition: width var(--transition-fast);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.transfer-actions {
    display: flex;
    justify-content: center;
}

.transfer-actions .btn {
    min-width: 120px;
}

/* Transfer Complete State */
.transfer-card.complete .progress-fill {
    background: var(--color-success);
}

/* ============================================
   MODALS
   ============================================ */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

/* Pair modal should appear above QR modal */
#pair-modal {
    z-index: var(--z-modal-top);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: var(--color-bg-overlay);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 360px;
    padding: var(--space-8);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
    animation: modalIn var(--transition-spring);
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }

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

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.modal-close svg {
    width: 16px;
    height: 16px;
}

.modal-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-light);
    border-radius: var(--radius-full);
    color: var(--color-accent);
}

.modal-icon svg {
    width: 32px;
    height: 32px;
}

.modal-content h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.modal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.pair-file-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
}

#pair-file-name {
    font-weight: var(--font-weight-medium);
    word-break: break-all;
}

#pair-file-size {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.modal-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

.modal-actions .btn {
    flex: 1;
}

/* QR Modal */
.qr-modal-content {
    max-width: 320px;
}

.qr-modal-content h3 {
    margin-bottom: var(--space-2);
}

.qr-code-container {
    display: flex;
    justify-content: center;
    padding: var(--space-4);
    background: #ffffff;
    border-radius: var(--radius-md);
    margin: var(--space-4) 0;
}

.qr-code-container canvas {
    max-width: 100%;
    height: auto;
}

.room-link {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.room-link input {
    flex: 1;
    padding: var(--space-3);
    font-family: inherit;
    font-size: var(--font-size-sm);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
}

.room-link input:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    width: 100%;
    max-width: 400px;
    padding: 0 var(--space-4);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: toastIn var(--transition-spring);
}

.toast.success {
    border-left: 3px solid var(--color-success);
}

.toast.error {
    border-left: 3px solid var(--color-error);
}

.toast.info {
    border-left: 3px solid var(--color-accent);
}

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

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

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }

    to {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: var(--space-5) var(--space-6);
    text-align: center;
    border-top: 1px solid var(--color-border-light);
    background: linear-gradient(180deg, transparent, var(--color-bg-secondary));
}

.footer p {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
}

.footer .developer-credit {
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   TRANSFER TIP BANNER
   ============================================ */

.transfer-tip {
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--color-accent-light), rgba(48, 209, 88, 0.1));
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    animation: tipFade 3s ease-in-out infinite;
    border: 1px solid var(--color-border-light);
    transition: opacity 0.3s ease;
}

@keyframes tipFade {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Mobile First Adjustments */
@media (max-width: 480px) {
    .header {
        padding: var(--space-3) var(--space-4);
    }

    .logo-text {
        font-size: var(--font-size-lg);
    }

    .screen {
        padding: var(--space-4);
    }

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

    .landing-animation {
        width: 120px;
        height: 120px;
    }

    .device-icon {
        width: 48px;
        height: 48px;
    }

    .devices-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }

    .device-card {
        padding: var(--space-4);
    }

    .device-card-icon {
        width: 48px;
        height: 48px;
    }

    .drop-zone {
        padding: var(--space-6);
    }

    .transfer-card {
        padding: var(--space-6);
    }

    .modal-content {
        padding: var(--space-6);
    }
}

/* Tablet and Desktop */
@media (min-width: 768px) {
    .devices-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }

    .device-card {
        padding: var(--space-8);
    }

    .device-card-icon {
        width: 64px;
        height: 64px;
    }

    .device-card-icon svg {
        width: 32px;
        height: 32px;
    }
}

/* Large Screens */
@media (min-width: 1024px) {
    .screen-discovery {
        max-width: 1000px;
        margin: 0 auto;
    }

    .devices-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

/* Touch Devices */
@media (hover: none) {
    .device-card:hover {
        transform: none;
    }

    .btn-primary:hover {
        transform: none;
    }

    .device-card:active {
        transform: scale(0.98);
    }

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

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

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