/* ===== CSS Variables ===== */
:root {
    --nano-blue: #209CE9;
    --nano-blue-dark: #1A7FC1;
    --nano-blue-light: #4FB8F7;
    --nano-blue-glow: rgba(32, 156, 233, 0.4);

    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-input: rgba(255, 255, 255, 0.05);

    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    --border-color: rgba(255, 255, 255, 0.1);
    --border-focus: var(--nano-blue);

    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --shadow-glow: 0 0 60px var(--nano-blue-glow);
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.5);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ===== 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;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Background Effects ===== */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--nano-blue);
    top: -200px;
    left: -200px;
    opacity: 0.3;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: var(--nano-blue-dark);
    bottom: -150px;
    right: -150px;
    animation-delay: -7s;
    opacity: 0.25;
}

.glow-3 {
    width: 400px;
    height: 400px;
    background: var(--nano-blue-light);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
    opacity: 0.15;
}

@keyframes float {

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

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(20px, 30px) scale(1.02);
    }
}

/* ===== Container ===== */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ===== Header ===== */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 12px;
}

.nano-logo {
    width: 56px;
    height: 56px;
    filter: drop-shadow(0 0 20px var(--nano-blue-glow));
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        filter: drop-shadow(0 0 20px var(--nano-blue-glow));
    }

    50% {
        filter: drop-shadow(0 0 30px var(--nano-blue));
    }
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary), var(--nano-blue-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
}

/* ===== Faucet Card ===== */
.faucet-card {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
}

/* ===== Balance Display ===== */
.balance-display {
    text-align: center;
    padding: 24px;
    background: linear-gradient(135deg, rgba(32, 156, 233, 0.1), rgba(26, 127, 193, 0.05));
    border-radius: var(--radius-md);
    margin-bottom: 28px;
    border: 1px solid rgba(32, 156, 233, 0.2);
}

.balance-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.balance-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 8px;
}

.balance-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--nano-blue-light);
    font-variant-numeric: tabular-nums;
}

.balance-unit {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ===== Claim Form ===== */
.claim-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 24px;
}

.input-group {
    position: relative;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    padding: 16px 20px;
    font-size: 1rem;
    font-family: 'Roboto Mono', 'Consolas', monospace;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-normal);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.input-group input:focus {
    border-color: var(--nano-blue);
    background: rgba(32, 156, 233, 0.05);
    box-shadow: 0 0 0 4px rgba(32, 156, 233, 0.1);
}

.input-decoration {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--nano-blue), var(--nano-blue-light));
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.input-group input:focus+.input-decoration {
    width: 100%;
}

/* ===== Claim Button ===== */
.claim-button {
    position: relative;
    padding: 18px 32px;
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--nano-blue), var(--nano-blue-dark));
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.claim-button::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 ease;
}

.claim-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(32, 156, 233, 0.4);
}

.claim-button:hover::before {
    left: 100%;
}

.claim-button:active {
    transform: translateY(0);
}

.claim-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.claim-button.loading .button-text {
    opacity: 0;
}

.claim-button.loading .button-loader {
    opacity: 1;
}

.button-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    opacity: 0;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* ===== Message ===== */
.message {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 0.95rem;
    line-height: 1.5;
    animation: slideIn 0.3s ease;
}

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

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

.message.hidden {
    display: none;
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
}

.message a {
    color: inherit;
    font-weight: 600;
}

/* ===== Faucet Info ===== */
.faucet-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
}

.info-icon {
    font-size: 1.5rem;
}

.info-content {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== Features ===== */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
    width: 100%;
}

.feature {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.feature:hover {
    transform: translateY(-4px);
    border-color: rgba(32, 156, 233, 0.3);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.feature h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.feature p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ===== Footer ===== */
.footer {
    margin-top: auto;
    padding-top: 48px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer a {
    color: var(--nano-blue-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--nano-blue);
    text-decoration: underline;
}

.faucet-address {
    margin-top: 8px;
    font-size: 0.75rem;
    word-break: break-all;
}

.faucet-address a {
    font-family: 'Roboto Mono', 'Consolas', monospace;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .container {
        padding: 24px 16px;
    }

    .logo h1 {
        font-size: 1.75rem;
    }

    .nano-logo {
        width: 44px;
        height: 44px;
    }

    .tagline {
        font-size: 0.95rem;
    }

    .faucet-card {
        padding: 24px 20px;
    }

    .balance-value {
        font-size: 2rem;
    }

    .features {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .feature {
        padding: 20px;
    }

    .faucet-info {
        grid-template-columns: 1fr;
    }
}

/* ===== Header with Auth ===== */
.header-branding {
    text-align: center;
    margin-bottom: 16px;
}

.header-branding .logo {
    justify-content: center;
}

.header-branding .tagline {
    margin-top: 8px;
}

.user-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.guest-actions {
    display: flex;
    gap: 8px;
}

.auth-btn {
    padding: 10px 18px;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.auth-btn:hover {
    border-color: var(--nano-blue);
    color: var(--text-primary);
    background: rgba(32, 156, 233, 0.1);
}

.auth-btn.primary {
    background: linear-gradient(135deg, var(--nano-blue), var(--nano-blue-dark));
    border-color: transparent;
    color: white;
}

.auth-btn.primary:hover {
    background: linear-gradient(135deg, var(--nano-blue-light), var(--nano-blue));
    box-shadow: 0 4px 15px rgba(32, 156, 233, 0.4);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.username {
    color: var(--nano-blue-light);
    font-weight: 600;
    font-size: 0.9rem;
}

.username::before {
    content: '👤 ';
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    animation: modalSlideIn 0.3s ease;
}

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

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

.modal-header {
    text-align: center;
    padding: 32px 32px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-logo {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.modal-body {
    padding: 24px 32px 32px;
}

/* ===== Onboarding Options ===== */
.onboarding-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.onboarding-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
}

.onboarding-btn:hover {
    border-color: var(--nano-blue);
    background: rgba(32, 156, 233, 0.1);
}

.onboarding-btn.primary {
    border-color: var(--nano-blue);
    background: rgba(32, 156, 233, 0.1);
}

.onboarding-btn.secondary {
    opacity: 0.7;
}

.btn-icon {
    font-size: 1.5rem;
}

.btn-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.btn-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Learn NANO Section ===== */
.back-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    margin-bottom: 20px;
    padding: 0;
    transition: color var(--transition-fast);
}

.back-btn:hover {
    color: var(--nano-blue);
}

.learn-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    margin-top: 20px;
}

.learn-content h3:first-child {
    margin-top: 0;
}

.learn-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.wallet-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

.wallet-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.wallet-card:hover {
    border-color: var(--nano-blue);
    background: rgba(32, 156, 233, 0.1);
}

.wallet-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.wallet-name {
    font-weight: 600;
    color: var(--text-primary);
}

.wallet-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.steps-list {
    padding-left: 20px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.steps-list li {
    margin-bottom: 8px;
}

/* ===== Auth Form ===== */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.auth-form h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.auth-error {
    padding: 12px 16px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-size: 0.875rem;
}

.auth-switch {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.auth-switch a {
    color: var(--nano-blue);
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

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

@media (max-width: 640px) {
    .header-top {
        flex-direction: column;
        gap: 16px;
    }

    .modal-content {
        max-height: 85vh;
    }

    .modal-header,
    .modal-body {
        padding: 20px;
    }

    .wallet-options {
        grid-template-columns: 1fr;
    }
}

/* ===== Captcha & Auth Required ===== */
.captcha-container {
    display: flex;
    justify-content: center;
    margin: 16px 0;
}

.auth-required-message {
    padding: 16px;
    background: rgba(32, 156, 233, 0.1);
    border: 1px solid rgba(32, 156, 233, 0.3);
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.auth-required-message a {
    color: var(--nano-blue-light);
    text-decoration: none;
    font-weight: 600;
}

.auth-required-message a:hover {
    text-decoration: underline;
}