/* =====================================================
   Strmiska AI – Global Design System
   ====================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Variables ─────────────────────────────────── */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: hsl(215, 21%, 11%);
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;
    --bg-hover: #30363d;
    --bg-input: #161b22;

    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;

    --accent-green: #238636;
    --accent-green-hover: #2ea043;
    --accent-green-glow: rgba(35, 134, 54, 0.3);
    --accent-green-subtle: rgba(35, 134, 54, 0.15);

    --border-default: #30363d;
    --border-muted: #21262d;

    --danger: #f85149;
    --danger-subtle: rgba(248, 81, 73, 0.15);
    --warning: #d29922;
    --warning-subtle: rgba(210, 153, 34, 0.15);
    --info: #58a6ff;
    --info-subtle: rgba(88, 166, 255, 0.15);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-green-glow);

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

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ─── Reset ─────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--accent-green);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-green-hover);
}

img {
    max-width: 100%;
    display: block;
}

/* ─── Typography ────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

/* ─── Buttons ───────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

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

.btn:hover::after {
    opacity: 1;
}

.btn-primary {
    background: var(--accent-green);
    color: #fff;
    box-shadow: 0 2px 8px var(--accent-green-glow);
}

.btn-primary:hover {
    background: var(--accent-green-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

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

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

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--text-muted);
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-danger:hover {
    background: var(--danger-subtle);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ─── Inputs ────────────────────────────────────────── */
.form-group {
    margin-bottom: 20px;
}

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

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px var(--accent-green-glow);
}

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

.form-input.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px var(--danger-subtle);
}

.input-wrapper {
    position: relative;
}

.input-wrapper .form-input {
    padding-right: 48px;
}

.input-icon {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    background: none;
    border: none;
    font-size: 1.1rem;
    padding: 4px;
}

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

textarea.form-input {
    min-height: 100px;
    resize: vertical;
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

/* ─── Cards ─────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition-normal);
}

.card-glass {
    background: rgba(28, 33, 40, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(48, 54, 61, 0.5);
}

.card:hover {
    border-color: var(--bg-hover);
}

/* ─── Alerts ────────────────────────────────────────── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: slideIn var(--transition-normal) ease-out;
}

.alert-error {
    background: var(--danger-subtle);
    color: var(--danger);
    border: 1px solid rgba(248, 81, 73, 0.3);
}

.alert-success {
    background: var(--accent-green-subtle);
    color: var(--accent-green-hover);
    border: 1px solid rgba(35, 134, 54, 0.3);
}

.alert-warning {
    background: var(--warning-subtle);
    color: var(--warning);
    border: 1px solid rgba(210, 153, 34, 0.3);
}

.alert-info {
    background: var(--info-subtle);
    color: var(--info);
    border: 1px solid rgba(88, 166, 255, 0.3);
}

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

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

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

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

/* ─── Animations ────────────────────────────────────── */
@keyframes spin {
    to { transform: rotate(360deg); }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

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

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

@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px var(--accent-green-glow); }
    50%      { box-shadow: 0 0 20px var(--accent-green-glow), 0 0 40px rgba(35, 134, 54, 0.1); }
}

.animate-fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp var(--transition-slow) ease-out;
}

/* ─── Utilities ─────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--accent-green); }
.text-danger { color: var(--danger); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 768px) {
    html { font-size: 15px; }
    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.3rem; }
    .card { padding: 18px; }
}