/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-hover: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(139, 92, 246, 0.5);
    --text-primary: #f0f0f5;
    --text-secondary: #9898b0;
    --text-muted: #5a5a78;
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --accent-glow: rgba(139, 92, 246, 0.25);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.08);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, .15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(59, 130, 246, .08), transparent);
}

/* LOGIN */
.login-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    background: var(--bg-primary);
    padding: 1rem;
    background-image: inherit;
    transition: opacity .5s ease, transform .5s ease;
}

.login-screen.hidden {
    opacity: 0;
    transform: scale(1.02);
    pointer-events: none;
}

.login-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    max-width: 440px;
    width: 100%;
    text-align: center;
    animation: slideUp .6s ease;
}

.login-logo {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

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

    50% {
        transform: scale(1.1)
    }
}

.login-card h1 {
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: -.03em;
    margin-bottom: .75rem;
}

.login-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.login-divider {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    margin: 0 auto 1.5rem;
}

.login-info {
    color: var(--text-muted);
    font-size: .9rem;
    margin-bottom: 1.25rem;
}

/* GOOGLE BTN */
.btn-google {
    width: 100%;
    padding: .9rem 1.5rem;
    background: #fff;
    color: #3c4043;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
    transition: var(--transition);
    font-family: inherit;
}

.btn-google:hover:not(:disabled) {
    background: #f8f9fa;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .3);
    transform: translateY(-1px);
}

.btn-google:disabled {
    opacity: .5;
    cursor: wait;
}

.privacy-note {
    font-size: .8rem;
    color: var(--text-muted);
    margin-top: 1.25rem;
}

/* SHARED BTN */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    font-family: inherit;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.btn-search {
    width: 100%;
    padding: 1.1rem;
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    min-height: 60px;
}

.btn-search:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px var(--accent-glow);
}

.btn-search:disabled {
    opacity: .4;
    cursor: not-allowed;
}

.btn-search.loading .btn-text {
    display: none;
}

.btn-search.loading .btn-loader {
    display: flex;
}

.btn-loader {
    display: none;
    gap: 6px;
    align-items: center;
    justify-content: center;
}

.btn-loader .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    animation: bounce 1.4s ease-in-out infinite both;
}

.btn-loader .dot:nth-child(2) {
    animation-delay: .16s;
}

.btn-loader .dot:nth-child(3) {
    animation-delay: .32s;
}

@keyframes bounce {

    0%,
    80%,
    100% {
        transform: scale(.6);
        opacity: .4
    }

    40% {
        transform: scale(1);
        opacity: 1
    }
}

/* HEADER */
.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding: .6rem .8rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: .6rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent);
}

.user-name {
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-secondary);
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-logout {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-family: inherit;
    font-size: .8rem;
    font-weight: 600;
    padding: .35rem .9rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-logout:hover {
    color: var(--error);
    border-color: var(--error);
    background: var(--error-bg);
}

/* APP */
.app-container {
    width: 100%;
    max-width: 600px;
    padding: 2rem 1.5rem;
    animation: fadeInUp .5s ease;
}

.app-container.hidden {
    display: none;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: clamp(2.2rem, 6vw, 3.2rem);
    font-weight: 900;
    letter-spacing: -.03em;
    line-height: 1.1;
}

header h1 .accent {
    background: linear-gradient(135deg, var(--accent-light), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* TABS */
.tab-nav {
    display: flex;
    gap: .5rem;
    justify-content: center;
    margin-top: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: .35rem;
}

.tab-btn {
    flex: 1;
    padding: .55rem 1.25rem;
    background: transparent;
    border: none;
    border-radius: 50px;
    color: var(--text-muted);
    font-family: inherit;
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover:not(.active) {
    color: var(--text-secondary);
    background: var(--surface-hover);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.tab-panel {
    animation: fadeInUp .35s ease;
}

.tab-panel.hidden {
    display: none;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.75rem;
    font-weight: 500;
}

.btn-story {
    background: linear-gradient(135deg, #0ea5e9, #0369a1);
}

.btn-story:hover:not(:disabled) {
    box-shadow: 0 12px 40px rgba(14, 165, 233, .3);
}

/* story warning block */
.story-warning {
    margin-top: 1.25rem;
    padding: .75rem 1rem;
    background: rgba(245, 158, 11, .08);
    border: 1px solid rgba(245, 158, 11, .25);
    border-radius: var(--radius-sm);
    font-size: .88rem;
    color: #fbbf24;
    line-height: 1.6;
}

/* SEARCH */
.search-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-wrapper textarea {
    width: 100%;
    padding: 1.2rem 1.5rem;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.6;
    resize: vertical;
    min-height: 110px;
    outline: none;
    transition: var(--transition);
}

.input-wrapper textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: rgba(255, 255, 255, .06);
}

.input-wrapper textarea::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

/* RESULT */
.result-card {
    margin-top: 2rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, .08), rgba(59, 130, 246, .05));
    border: 1px solid rgba(139, 92, 246, .2);
    border-radius: var(--radius-lg);
    padding: 2rem;
    animation: fadeInUp .5s ease;
}

.result-card.hidden {
    display: none;
}

.result-header {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(139, 92, 246, .15);
}

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

.result-label {
    font-size: .85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--accent-light);
}

.result-content {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-primary);
    white-space: pre-line;
}

.result-content strong {
    color: var(--accent-light);
    font-weight: 700;
}

/* ERROR */
.error-card {
    margin-top: 2rem;
    background: var(--error-bg);
    border: 1px solid rgba(239, 68, 68, .2);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    animation: fadeInUp .5s ease;
}

.error-card.hidden {
    display: none;
}

.error-header {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-bottom: .75rem;
}

.error-icon {
    font-size: 1.3rem;
}

.error-label {
    font-size: .85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--error);
}

.error-content {
    font-size: .95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-muted);
    font-size: .85rem;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(.96)
    }

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px)
    }

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

@media(max-width:480px) {
    .app-container {
        padding: 1.5rem 1rem;
    }

    .login-card {
        padding: 2rem 1.5rem;
    }

    .header-top {
        flex-wrap: wrap;
        gap: .5rem;
        justify-content: center;
        border-radius: var(--radius-sm);
    }

    .user-name {
        max-width: 120px;
    }

    .input-wrapper textarea {
        font-size: 1rem;
        padding: 1rem 1.2rem;
    }

    .btn-search {
        font-size: 1.05rem;
        padding: 1rem;
        min-height: 52px;
    }

    .result-card {
        padding: 1.5rem;
    }

    .result-content {
        font-size: 1.05rem;
    }
}