:root {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f9f9f9;
    --border-color: #e5e5e5;
    --text-primary: #171717;
    --text-secondary: #737373;
    --text-tertiary: #92400e;
    --success-bg: #10b981;
    --error-bg: #ef4444;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --warning-icon: #d97706;
    --btn-bg: #171717;
    --btn-hover: #262626;
    --grid-color: rgba(0, 0, 0, 0.10);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #0a0a0a;
        --bg-secondary: #171717;
        --bg-tertiary: #1f1f1f;
        --border-color: #2a2a2a;
        --text-primary: #fafafa;
        --text-secondary: #a3a3a3;
        --text-tertiary: #fbbf24;
        --success-bg: #10b981;
        --error-bg: #ef4444;
        --warning-bg: #422006;
        --warning-border: #78350f;
        --warning-icon: #fbbf24;
        --btn-bg: #fafafa;
        --btn-hover: #e5e5e5;
        --grid-color: rgba(255, 255, 255, 0.10);
    }
}

:root[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #171717;
    --bg-tertiary: #1f1f1f;
    --border-color: #2a2a2a;
    --text-primary: #fafafa;
    --text-secondary: #a3a3a3;
    --text-tertiary: #fbbf24;
    --success-bg: #10b981;
    --error-bg: #ef4444;
    --warning-bg: #422006;
    --warning-border: #78350f;
    --warning-icon: #fbbf24;
    --btn-bg: #fafafa;
    --btn-hover: #e5e5e5;
    --grid-color: rgba(255, 255, 255, 0.15);
}

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

body {
    font-family: 'Be Vietnam Pro', sans-serif;
    background: var(--bg-primary);
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 32px 32px;
    background-position: center center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, transparent 0%, var(--bg-primary) 100%);
    pointer-events: none;
}

.theme-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 10000;
    color: var(--text-primary);
}

.theme-toggle:hover {
    transform: scale(1.05);
    border-color: var(--text-secondary);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.theme-toggle .sun-icon {
    display: none;
}

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

:root[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;
    }
}

.container {
    width: 100%;
    max-width: 520px;
    position: relative;
    z-index: 1;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.icon-wrapper {
    width: 64px;
    height: 64px;
    background: var(--success-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    animation: scaleIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.icon-wrapper.error {
    background: var(--error-bg);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

h1 {
    font-family: 'Montserrat Alternates', sans-serif;
    font-weight: 600;
    font-size: 24px;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 12px;
}

.message {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
    line-height: 1.6;
}

.key-container {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    opacity: 0;
    animation: slideUpFade 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.key-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.key-value {
    font-family: 'Courier New', monospace;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-all;
    user-select: all;
    opacity: 0;
    animation: fadeInKey 0.4s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
}

@keyframes fadeInKey {
    from {
        opacity: 0;
        filter: blur(8px);
    }
    to {
        opacity: 1;
        filter: blur(0);
    }
}

.key-value.typing::after {
    content: '|';
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.btn-copy {
    width: 100%;
    height: 48px;
    background: var(--btn-bg);
    color: var(--bg-primary);
    border: none;
    border-radius: 10px;
    font-family: 'Be Vietnam Pro', sans-serif;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    animation: slideUpFade 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
}

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

.btn-copy:active {
    transform: translateY(0);
}

.btn-copy.copied {
    background: var(--success-bg);
    color: #ffffff;
}

.btn-getlink {
    width: 100%;
    height: 48px;
    background: var(--btn-bg);
    color: var(--bg-primary);
    border: none;
    border-radius: 10px;
    font-family: 'Be Vietnam Pro', sans-serif;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    margin-bottom: 20px;
}

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

.btn-getlink:active {
    transform: translateY(0);
}

.btn-getlink:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.btn-getlink:disabled:hover {
    transform: translateY(0);
    background: var(--bg-tertiary);
}

.info-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.info-box svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--text-secondary);
}

.info-text {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-item-value {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
}

.status-ready {
    background: #d1fae5;
    color: #065f46;
}

.status-used {
    background: #fee2e2;
    color: #991b1b;
}

:root[data-theme="dark"] .status-ready {
    background: #064e3b;
    color: #6ee7b7;
}

:root[data-theme="dark"] .status-used {
    background: #7f1d1d;
    color: #fca5a5;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .status-ready {
        background: #064e3b;
        color: #6ee7b7;
    }

    :root:not([data-theme="light"]) .status-used {
        background: #7f1d1d;
        color: #fca5a5;
    }
}

.warning-box {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-radius: 10px;
    padding: 16px;
    margin-top: 20px;
    display: flex;
    gap: 12px;
    opacity: 0;
    animation: slideUpFade 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
}

.warning-box svg {
    flex-shrink: 0;
    margin-top: 2px;
    stroke: var(--warning-icon);
}

.warning-text {
    font-size: 13px;
    color: var(--text-tertiary);
    line-height: 1.5;
}

.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--btn-bg);
    color: var(--bg-primary);
    padding: 16px 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    border: 1px solid var(--border-color);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-text {
    font-size: 14px;
    font-weight: 500;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 10;
    opacity: 1;
    transition: opacity 0.4s ease-out;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 56px;
    height: 56px;
    border: 4px solid var(--border-color);
    border-top-color: var(--success-bg);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-family: 'Be Vietnam Pro', sans-serif;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '';
    }
    40% {
        content: '.';
    }
    60% {
        content: '..';
    }
    80%, 100% {
        content: '...';
    }
}

.footer {
    position: fixed;
    bottom: 20px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    z-index: 1;
}

@media (max-width: 640px) {
    .card {
        padding: 32px 24px;
    }

    h1 {
        font-size: 20px;
    }

    .toast {
        top: 16px;
        right: 16px;
        left: 16px;
    }
}