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

:root {
    --color-bg: #0d1117;
    --color-surface: #161b22;
    --color-surface-2: #1c2129;
    --color-surface-3: #21262d;
    --color-border: #30363d;
    --color-border-muted: #21262d;
    --color-text: #e6edf3;
    --color-text-muted: #7d8590;
    --color-text-subtle: #484f58;
    --color-primary: #58a6ff;
    --color-primary-hover: #79b8ff;
    --color-accent: #f78166;
    --color-green: #3fb950;
    --color-green-muted: rgba(63, 185, 80, 0.15);
    --color-yellow: #d29922;
    --color-red: #f85149;
    --color-purple: #bc8cff;
    --color-cyan: #39d2c0;
    --radius: 6px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --shadow: 0 3px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --transition: 0.2s ease;
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, 'SFMono-Regular', 'SF Mono', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 1.25rem;
    width: 100%;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* ===== HEADER ===== */
.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(22, 27, 34, 0.85);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 62px;
}

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

.git-icon {
    color: var(--color-accent);
    display: flex;
    align-items: center;
    transition: transform var(--transition);
}
.git-icon:hover {
    transform: rotate(20deg);
}

.header__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
}

.header__title--accent {
    color: var(--color-green);
}

.header__subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    letter-spacing: 0.01em;
}

.header__branch-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--color-green-muted);
    color: var(--color-green);
    border: 1px solid rgba(63, 185, 80, 0.3);
    padding: 0.3rem 0.75rem;
    border-radius: 2em;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    font-weight: 500;
}

/* ===== MAIN ===== */
.main {
    flex: 1;
    padding: 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ===== TERMINAL CARD ===== */
.terminal-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: border-color var(--transition);
}

.terminal-card:focus-within {
    border-color: var(--color-text-subtle);
}

.terminal-bar {
    background: var(--color-surface-3);
    border-bottom: 1px solid var(--color-border);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    user-select: none;
}

.terminal-dots {
    display: flex;
    gap: 0.4rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    transition: opacity var(--transition);
}

.dot--red { background: #ff5f57; }
.dot--yellow { background: #febc2e; }
.dot--green { background: #28c840; }

.terminal-bar__title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    flex: 1;
    text-align: center;
    margin-right: 3rem; /* compensate for dots */
}

.terminal-body {
    padding: 0;
}

.terminal-prompt {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.prompt-symbol {
    color: var(--color-green);
    font-weight: 700;
}

.prompt-text {
    color: var(--color-text-muted);
}

.textarea {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.75rem 1rem 1rem;
    resize: vertical;
    outline: none;
    min-height: 180px;
    line-height: 1.6;
}

.textarea::placeholder {
    color: var(--color-text-subtle);
    font-family: var(--font-mono);
}

.textarea.error {
    box-shadow: inset 0 0 0 1px var(--color-red);
}

/* ===== OPTIONS BAR ===== */
.options-bar {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.option-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 2em;
    padding: 0.4rem 0.5rem 0.4rem 0.85rem;
    flex: 1;
    min-width: 180px;
    transition: border-color var(--transition);
}

.option-chip:hover,
.option-chip:focus-within {
    border-color: var(--color-text-subtle);
}

.chip-label {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    cursor: default;
}

.select {
    background: transparent;
    border: none;
    color: var(--color-text);
    font-family: var(--font);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    flex: 1;
    min-width: 0;
    padding: 0.25rem 0;
}

.select option {
    background: var(--color-surface);
    color: var(--color-text);
}

/* ===== BUTTONS ===== */
.btn {
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font);
    font-weight: 600;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn--generate {
    background: var(--color-green);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    width: 100%;
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-lg);
    letter-spacing: -0.01em;
    box-shadow: 0 0 0 0 rgba(63, 185, 80, 0);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.btn--generate::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn--generate:hover {
    background: #46c465;
    box-shadow: 0 0 20px rgba(63, 185, 80, 0.3);
}

.btn--generate:hover::before {
    opacity: 1;
}

.btn--generate:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
    border-radius: var(--radius);
}

.btn--ghost:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
    background: var(--color-surface-3);
}

.btn--sm {
    padding: 0.3rem 0.7rem;
    font-size: 0.75rem;
}

.btn--copy {
    background: var(--color-surface-3);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-mono);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
}

.btn--copy:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(88, 166, 255, 0.08);
}

.btn--copy.copied {
    border-color: var(--color-green);
    color: var(--color-green);
    background: var(--color-green-muted);
}

/* ===== LOADING ===== */
.loading-section {
    padding: 1.5rem 0;
}

.loading-terminal {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    font-family: var(--font-mono);
}

.loading-line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.loading-prompt {
    color: var(--color-green);
    font-weight: 700;
}

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

.loading-cursor {
    color: var(--color-green);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.loading-spinner-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== RESULTS ===== */
.results-section,
.history-section {
    animation: slideUp 0.3s var(--transition-slow);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.results-title-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.results-icon {
    color: var(--color-text-muted);
}

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.results-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    background: var(--color-surface);
    padding: 0.2rem 0.6rem;
    border-radius: 2em;
    border: 1px solid var(--color-border);
}

/* ===== GIT LOG (Branch line + Commit nodes) ===== */
.git-log {
    position: relative;
    padding-left: 2rem;
}

.git-log__branch-line {
    position: absolute;
    left: 0.55rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-green);
    border-radius: 1px;
}

.git-log__branch-line--muted {
    background: var(--color-text-subtle);
}

.suggestions-container,
.history-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* ===== SUGGESTION CARD (Git commit style) ===== */
.suggestion-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 0.9rem 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    position: relative;
    animation: fadeIn 0.3s ease;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.suggestion-card:hover {
    border-color: var(--color-text-subtle);
    box-shadow: var(--shadow);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    left: -1.65rem;
    top: 1.1rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-green);
    border: 2px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-green);
    z-index: 1;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateX(-8px); }
    to   { opacity: 1; transform: translateX(0); }
}

.suggestion-content {
    flex: 1;
    min-width: 0;
}

.suggestion-hash {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.suggestion-hash svg {
    opacity: 0.7;
}

.suggestion-message {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--color-text);
    word-break: break-word;
    line-height: 1.5;
}

.suggestion-type-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 600;
    font-family: var(--font-mono);
    padding: 0.1rem 0.5rem;
    border-radius: 2em;
    margin-right: 0.4rem;
    white-space: nowrap;
    vertical-align: middle;
}

.badge--feat {
    background: rgba(63, 185, 80, 0.12);
    color: var(--color-green);
    border: 1px solid rgba(63, 185, 80, 0.25);
}
.badge--fix {
    background: rgba(248, 81, 73, 0.12);
    color: var(--color-red);
    border: 1px solid rgba(248, 81, 73, 0.25);
}
.badge--refactor {
    background: rgba(188, 140, 255, 0.12);
    color: var(--color-purple);
    border: 1px solid rgba(188, 140, 255, 0.25);
}
.badge--docs {
    background: rgba(88, 166, 255, 0.12);
    color: var(--color-primary);
    border: 1px solid rgba(88, 166, 255, 0.25);
}
.badge--style,
.badge--chore {
    background: rgba(210, 153, 34, 0.12);
    color: var(--color-yellow);
    border: 1px solid rgba(210, 153, 34, 0.25);
}
.badge--test {
    background: rgba(57, 210, 192, 0.12);
    color: var(--color-cyan);
    border: 1px solid rgba(57, 210, 192, 0.25);
}
.badge--default {
    background: rgba(88, 166, 255, 0.12);
    color: var(--color-primary);
    border: 1px solid rgba(88, 166, 255, 0.25);
}

.suggestion-actions {
    display: flex;
    flex-shrink: 0;
    align-self: center;
}

/* ===== HISTORY ===== */
.history-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0.85rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}

.history-item::before {
    content: '';
    position: absolute;
    left: -1.65rem;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text-subtle);
    border: 2px solid var(--color-bg);
    z-index: 1;
}

.history-item:hover {
    border-color: var(--color-text-subtle);
    background: var(--color-surface-2);
}

.history-item:hover::before {
    background: var(--color-text-muted);
}

.history-item__text {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item:hover .history-item__text {
    color: var(--color-text);
}

.history-item__time {
    font-size: 0.7rem;
    color: var(--color-text-subtle);
    font-family: var(--font-mono);
    white-space: nowrap;
}

/* ===== FOOTER ===== */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 0.85rem 0;
    background: var(--color-surface);
    margin-top: auto;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer__left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.78rem;
}

.footer__left svg {
    color: var(--color-accent);
}

.footer__right {
    display: flex;
    align-items: center;
}

.footer__status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-muted);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-green);
    box-shadow: 0 0 6px rgba(63, 185, 80, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 6px rgba(63, 185, 80, 0.5); }
    50% { box-shadow: 0 0 12px rgba(63, 185, 80, 0.8); }
}

/* ===== RATE LIMIT BADGE ===== */
.rate-limit-badge {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    text-align: center;
    opacity: 0.9;
    transition: color var(--transition);
    padding: 0.35rem 0;
}

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

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

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-surface-3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-subtle);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
    .header__subtitle {
        display: none;
    }

    .header__branch-badge span {
        display: none;
    }

    .options-bar {
        flex-direction: column;
    }

    .option-chip {
        min-width: auto;
    }

    .suggestion-card {
        flex-direction: column;
        gap: 0.5rem;
    }

    .suggestion-actions {
        align-self: flex-end;
    }

    .footer__inner {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .git-log {
        padding-left: 1.5rem;
    }

    .suggestion-card::before {
        left: -1.25rem;
        width: 10px;
        height: 10px;
    }

    .history-item::before {
        left: -1.25rem;
        width: 6px;
        height: 6px;
    }

    .git-log__branch-line {
        left: 0.35rem;
    }
}

@media (max-width: 400px) {
    .header__title {
        font-size: 1rem;
    }

    .terminal-bar__title {
        display: none;
    }
}