/* ========================================
   SYS Faucet - Rollux Classroom
   Main Stylesheet
======================================== */

/* ========================================
   CSS Variables - Themes
======================================== */
:root {
    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.2);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #1a1a1d;
    --bg-card: #16161a;
    --bg-hover: #222228;
    --accent-primary: #00ff88;
    --accent-secondary: #00d4ff;
    --accent-warning: #ffb800;
    --accent-danger: #ff4757;
    --accent-purple: #a855f7;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a5;
    --text-muted: #5a5a5f;
    --border-color: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.15);
    --glow-primary: rgba(0,255,136,0.3);
    --glow-secondary: rgba(0,212,255,0.3);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8ed;
    --bg-card: #ffffff;
    --bg-hover: #f0f0f5;
    --accent-primary: #00c853;
    --accent-secondary: #0091ea;
    --accent-warning: #ff8f00;
    --accent-danger: #e53935;
    --accent-purple: #9333ea;
    --text-primary: #1a1a1d;
    --text-secondary: #555555;
    --text-muted: #888888;
    --border-color: rgba(0,0,0,0.08);
    --border-hover: rgba(0,0,0,0.15);
    --glow-primary: rgba(0,200,83,0.2);
    --glow-secondary: rgba(0,145,234,0.2);
}

/* ========================================
   Base Styles
======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-display);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* ========================================
   Header
======================================== */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: #000;
}

.header-logo-text {
    font-weight: 600;
    font-size: 1rem;
}

.header-logo-text span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: block;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
    color: var(--text-primary);
}

.btn-icon:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

/* ========================================
   Main Container
======================================== */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.main-centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 200px);
}

/* ========================================
   Cards
======================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.card-gradient {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    position: relative;
}

.card-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-purple));
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* ========================================
   Faucet Wallet Card
======================================== */
.faucet-wallet-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.faucet-wallet-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-purple));
}

.wallet-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}

.wallet-info {
    flex: 1;
    min-width: 300px;
}

.wallet-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.wallet-address-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.wallet-address {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    word-break: break-all;
}

.wallet-actions {
    display: flex;
    gap: 0.5rem;
}

/* ========================================
   QR Section
======================================== */
.wallet-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.qr-container {
    background: #fff;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: var(--transition);
}

.qr-container:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.qr-container img {
    display: block;
}

.qr-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ========================================
   Balance Section
======================================== */
.wallet-balance-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.balance-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    text-align: center;
}

.balance-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.35rem;
}

.balance-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.balance-value.warning {
    color: var(--accent-warning);
}

.balance-value.danger {
    color: var(--accent-danger);
}

/* ========================================
   Private Key Section
======================================== */
.private-key-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.pk-warning {
    background: rgba(255, 184, 0, 0.15);
    border: 1px solid var(--accent-warning);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.pk-warning-icon {
    font-size: 1.25rem;
}

.pk-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
}

.pk-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pk-value-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.pk-value {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-warning);
    background: var(--bg-tertiary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    word-break: break-all;
    min-width: 200px;
}

.pk-actions {
    display: flex;
    gap: 0.5rem;
}

.pk-actions-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.pk-actions-row .btn {
    flex: 1;
    min-width: 200px;
    justify-content: center;
}

.professor-wallet-display {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.professor-address {
    font-family: var(--font-mono);
    color: var(--accent-primary);
    word-break: break-all;
}

/* ========================================
   Configuration Section
======================================== */
.config-section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.config-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.config-card-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.config-input-group {
    display: flex;
    gap: 0.5rem;
}

.config-input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    transition: var(--transition);
}

.config-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--glow-primary);
}

.config-select {
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.config-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.config-checkbox {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem 0;
}

.config-checkbox input {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* ========================================
   Buttons
======================================== */
.btn {
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #00cc6a);
    color: #000;
    box-shadow: 0 4px 20px var(--glow-primary);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--glow-primary);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.btn-warning {
    background: linear-gradient(135deg, var(--accent-warning), #cc8800);
    color: #000;
}

.btn-warning:hover:not(:disabled) {
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--accent-danger), #cc3344);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
}

.btn-small {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.btn-small:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-tiny {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1rem;
    opacity: 0.7;
    transition: var(--transition);
}

.btn-tiny:hover {
    opacity: 1;
}

.btn-lg {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

/* ========================================
   Status Banner
======================================== */
.status-banner {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.status-banner.active {
    background: linear-gradient(135deg, rgba(0,255,136,0.1), rgba(0,212,255,0.1));
    border: 1px solid var(--accent-primary);
}

.status-banner.paused {
    background: linear-gradient(135deg, rgba(255,184,0,0.1), rgba(255,140,0,0.1));
    border: 1px solid var(--accent-warning);
}

.status-banner.inactive {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

.status-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-banner.active .status-dot {
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.status-banner.paused .status-dot {
    background: var(--accent-warning);
    box-shadow: 0 0 10px var(--accent-warning);
    animation: none;
}

.status-banner.inactive .status-dot {
    background: var(--text-muted);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.status-stats {
    display: flex;
    gap: 1.5rem;
}

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

.status-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--accent-primary);
}

.status-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ========================================
   Control Section
======================================== */
.control-section {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

/* ========================================
   Share Section (QR for students)
======================================== */
.share-section {
    background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(168,85,247,0.1));
    border: 1px solid var(--accent-secondary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.share-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.share-url-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.share-url {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    background: var(--bg-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    color: var(--accent-secondary);
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.share-qr-container {
    display: inline-block;
    cursor: pointer;
    transition: var(--transition);
}

.share-qr-container:hover {
    transform: scale(1.05);
}

/* ========================================
   Claims Section
======================================== */
.claims-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.claims-header {
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.claims-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.claims-count {
    background: var(--accent-primary);
    color: #000;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.claims-list {
    max-height: 400px;
    overflow-y: auto;
}

.claim-item {
    display: grid;
    grid-template-columns: 40px 1fr auto auto auto;
    gap: 1rem;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.claim-item:hover {
    background: var(--bg-hover);
}

.claim-number {
    width: 32px;
    height: 32px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.claim-address {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
}

.claim-amount {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent-primary);
}

.claim-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.claim-status {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.claim-status.pending {
    background: rgba(255,184,0,0.2);
    color: var(--accent-warning);
}

.claim-status.success {
    background: rgba(0,255,136,0.2);
    color: var(--accent-primary);
}

.claim-status.failed {
    background: rgba(255,71,87,0.2);
    color: var(--accent-danger);
}

.claims-empty {
    padding: 3rem;
    text-align: center;
    color: var(--text-secondary);
}

.claims-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* ========================================
   Student Section (Claim Page)
======================================== */
.student-section {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    border: 2px solid var(--accent-secondary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    position: relative;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.student-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-secondary), var(--accent-purple));
}

.student-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
}

.connect-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.step-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
}

.step-card.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--glow-primary);
}

.step-card.completed {
    border-color: var(--accent-primary);
    background: rgba(0,255,136,0.05);
}

.step-card.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 1rem;
    transition: var(--transition);
}

.step-card.completed .step-number {
    background: var(--accent-primary);
    color: #000;
}

.step-card.active .step-number {
    background: var(--accent-secondary);
    color: #000;
}

.step-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.step-btn {
    width: 100%;
}

.connected-address {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-primary);
    margin-top: 0.75rem;
    word-break: break-all;
    background: var(--bg-tertiary);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

/* ========================================
   Faucet Info (Claim Page)
======================================== */
.faucet-info {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.faucet-info-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.faucet-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.faucet-info-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
}

.faucet-info-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.faucet-info-value {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--accent-primary);
}

/* ========================================
   Modal
======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalIn 0.3s ease-out;
}

.modal-lg {
    max-width: 700px;
}

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

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* ========================================
   Toast Notifications
======================================== */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease-out;
    min-width: 300px;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 4px solid var(--accent-primary);
}

.toast.error {
    border-left: 4px solid var(--accent-danger);
}

.toast.warning {
    border-left: 4px solid var(--accent-warning);
}

.toast.info {
    border-left: 4px solid var(--accent-secondary);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.toast-message {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ========================================
   Loading Spinner
======================================== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========================================
   Utilities
======================================== */
.hidden {
    display: none !important;
}

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

.text-mono {
    font-family: var(--font-mono);
}

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

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

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

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ========================================
   Responsive
======================================== */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .wallet-header {
        flex-direction: column;
    }

    .wallet-qr {
        width: 100%;
    }

    .control-section {
        flex-direction: column;
    }

    .control-section .btn {
        width: 100%;
        justify-content: center;
    }

    .claim-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .claim-address {
        font-size: 0.8rem;
    }

    .status-stats {
        width: 100%;
        justify-content: space-around;
    }

    .pk-actions-row {
        flex-direction: column;
    }

    .pk-actions-row .btn {
        min-width: auto;
    }

    .share-url {
        max-width: 100%;
    }

    .connect-steps {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Scrollbar
======================================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}