/* =========================================================
   STRATAFLEET UI — CORE FOUNDATION LAYER
   Owns:
   - tokens
   - semantic colors
   - typography primitives
   - base links
   - buttons
   - badges
   - helper utilities
   - global background treatment

   Does NOT own:
   - sidebar shell
   - cards
   - tables
   - dashboard page geometry
   ========================================================= */

:root {
    /* -----------------------------------------------------
       BRAND / SURFACE TOKENS
       ----------------------------------------------------- */
    --sf-bg: #0b1422;
    --sf-bg-elevated: #0f1b2e;
    --sf-bg-deep: #08111d;

    --sf-panel: #111827;
    --sf-panel-2: #0b1220;
    --sf-panel-3: #10192b;

    --sf-blue: #2563eb;
    --sf-blue-2: #3b82f6;
    --sf-cyan: #38bdf8;
    --sf-cyan-2: #7dd3fc;
    --sf-green: #22c55e;
    --sf-amber: #f59e0b;
    --sf-red: #ef4444;

    --sf-text: #e2e8f0;
    --sf-text-strong: #f8fafc;
    --sf-text-soft: #94a3b8;
    --sf-text-faint: rgba(148, 163, 184, 0.78);

    --sf-border: rgba(56, 189, 248, 0.16);
    --sf-border-soft: rgba(148, 163, 184, 0.12);
    --sf-border-faint: rgba(148, 163, 184, 0.08);

    --sf-shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.34);
    --sf-shadow-md: 0 10px 28px rgba(0, 0, 0, 0.24);
    --sf-shadow-sm: 0 6px 16px rgba(0, 0, 0, 0.18);

    --sf-radius-2xl: 26px;
    --sf-radius-xl: 22px;
    --sf-radius-lg: 18px;
    --sf-radius-md: 14px;
    --sf-radius-sm: 10px;
    --sf-radius-xs: 8px;

    --sf-font-sans: "Inter", "Segoe UI", Arial, sans-serif;
    --sf-font: var(--sf-font-sans);

    --sf-transition-fast: 160ms ease;
    --sf-transition-base: 180ms ease;
    --sf-transition-slow: 260ms ease;

    --sf-focus-ring: 0 0 0 3px rgba(56, 189, 248, 0.18);
}


/* =========================================================
   GLOBAL BASE
   ========================================================= */

html,
body {
    background: var(--sf-bg);
    color: var(--sf-text);
    font-family: var(--sf-font);
    min-height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background:
        radial-gradient(circle at top center, rgba(37, 99, 235, 0.18), transparent 28%),
        radial-gradient(circle at 20% 10%, rgba(56, 189, 248, 0.10), transparent 22%),
        linear-gradient(180deg, #09111f 0%, #0f172a 54%, #0b1422 100%);
    min-height: 100vh;
    text-rendering: optimizeLegibility;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

img,
svg,
canvas {
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}


/* =========================================================
   GLOBAL LINK TREATMENT
   ========================================================= */

a {
    color: var(--sf-cyan);
    text-decoration: none;
    transition:
        color var(--sf-transition-fast),
        opacity var(--sf-transition-fast);
}

a:hover {
    color: var(--sf-cyan-2);
    text-decoration: none;
}


/* =========================================================
   PAGE BACKDROP
   ========================================================= */

.sf-page-bg {
    position: relative;
}

.sf-page-bg::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.12;
    background-image:
        linear-gradient(rgba(56, 189, 248, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 189, 248, 0.06) 1px, transparent 1px);
    background-size: 36px 36px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), rgba(0,0,0,0.35));
}


/* =========================================================
   TYPOGRAPHY PRIMITIVES
   ========================================================= */

.sf-heading-1 {
    font-size: clamp(2rem, 2.6vw, 2.6rem);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--sf-text-strong);
    margin: 0;
}

.sf-heading-2 {
    font-size: clamp(1.25rem, 1.4vw, 1.5rem);
    line-height: 1.12;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--sf-text-strong);
    margin: 0;
}

.sf-heading-3 {
    font-size: 1.04rem;
    line-height: 1.2;
    font-weight: 800;
    color: var(--sf-text-strong);
    margin: 0;
}

.sf-kicker {
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--sf-text-soft);
}

.sf-text-sm {
    font-size: 0.86rem;
    line-height: 1.45;
}

.sf-text-base {
    font-size: 0.94rem;
    line-height: 1.55;
}

.sf-text-soft {
    color: var(--sf-text-soft);
}

.sf-text-strong {
    color: var(--sf-text-strong);
}

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


/* =========================================================
   DIVIDERS / SURFACE HELPERS
   ========================================================= */

.sf-divider {
    border-top: 1px solid rgba(148, 163, 184, 0.10);
}

.sf-glass {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--sf-border-soft);
    backdrop-filter: blur(14px);
}

.sf-surface-soft {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--sf-border-faint);
    border-radius: var(--sf-radius-md);
}

.sf-surface-strong {
    background:
        linear-gradient(180deg, rgba(12, 19, 34, 0.92), rgba(9, 16, 29, 0.94));
    border: 1px solid var(--sf-border-soft);
    border-radius: var(--sf-radius-lg);
    box-shadow: var(--sf-shadow-md);
}


/* =========================================================
   BUTTON SYSTEM
   ========================================================= */

.sf-btn-primary,
.sf-btn-secondary,
.sf-btn-danger,
.sf-btn-ghost {
    min-height: 40px;
    border-radius: 12px;
    font-weight: 700;
    padding: 10px 16px;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    cursor: pointer;
    transition:
        transform var(--sf-transition-base),
        box-shadow var(--sf-transition-base),
        border-color var(--sf-transition-base),
        background var(--sf-transition-base),
        color var(--sf-transition-base);
}

.sf-btn-primary {
    color: #eff6ff;
    background: linear-gradient(180deg, rgba(37, 99, 235, 0.92), rgba(29, 78, 216, 0.88));
    border-color: rgba(56, 189, 248, 0.24);
    box-shadow:
        0 0 0 1px rgba(56, 189, 248, 0.10),
        0 10px 24px rgba(37, 99, 235, 0.18);
}

.sf-btn-primary:hover {
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow:
        0 0 0 1px rgba(56, 189, 248, 0.16),
        0 14px 32px rgba(37, 99, 235, 0.24);
}

.sf-btn-secondary {
    color: var(--sf-text);
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(148, 163, 184, 0.14);
}

.sf-btn-secondary:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(56, 189, 248, 0.22);
    transform: translateY(-1px);
}

.sf-btn-danger {
    color: #fff1f2;
    background: linear-gradient(180deg, rgba(220, 38, 38, 0.90), rgba(185, 28, 28, 0.88));
    border-color: rgba(248, 113, 113, 0.24);
    box-shadow:
        0 0 0 1px rgba(248, 113, 113, 0.08),
        0 10px 24px rgba(127, 29, 29, 0.20);
}

.sf-btn-danger:hover {
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow:
        0 0 0 1px rgba(248, 113, 113, 0.14),
        0 14px 30px rgba(127, 29, 29, 0.24);
}

.sf-btn-ghost {
    color: var(--sf-text-soft);
    background: transparent;
    border-color: rgba(148, 163, 184, 0.12);
}

.sf-btn-ghost:hover {
    color: #ffffff;
    background: rgba(255,255,255,0.04);
    border-color: rgba(148, 163, 184, 0.20);
}

.sf-btn-primary:focus-visible,
.sf-btn-secondary:focus-visible,
.sf-btn-danger:focus-visible,
.sf-btn-ghost:focus-visible,
button:focus-visible,
a:focus-visible {
    outline: none;
    box-shadow: var(--sf-focus-ring);
}


/* =========================================================
   BADGES / STATUS PILLS
   ========================================================= */

.sf-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 26px;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 0.76rem;
    font-weight: 700;
    line-height: 1;
    border: 1px solid transparent;
}

.sf-badge-success {
    color: #86efac;
    background: rgba(34, 197, 94, 0.14);
    border-color: rgba(34, 197, 94, 0.16);
}

.sf-badge-warning {
    color: #fcd34d;
    background: rgba(245, 158, 11, 0.14);
    border-color: rgba(245, 158, 11, 0.18);
}

.sf-badge-danger {
    color: #fca5a5;
    background: rgba(239, 68, 68, 0.14);
    border-color: rgba(239, 68, 68, 0.16);
}

.sf-badge-info {
    color: #7dd3fc;
    background: rgba(56, 189, 248, 0.14);
    border-color: rgba(56, 189, 248, 0.16);
}

.sf-badge-neutral {
    color: #cbd5e1;
    background: rgba(148, 163, 184, 0.12);
    border-color: rgba(148, 163, 184, 0.14);
}


/* =========================================================
   SMALL UTILITIES
   ========================================================= */

.sf-shadow-lg {
    box-shadow: var(--sf-shadow-lg);
}

.sf-shadow-md {
    box-shadow: var(--sf-shadow-md);
}

.sf-shadow-sm {
    box-shadow: var(--sf-shadow-sm);
}

.sf-radius-xl {
    border-radius: var(--sf-radius-xl);
}

.sf-radius-lg {
    border-radius: var(--sf-radius-lg);
}

.sf-radius-md {
    border-radius: var(--sf-radius-md);
}

.sf-radius-sm {
    border-radius: var(--sf-radius-sm);
}

.sf-w-100 {
    width: 100%;
}

.sf-text-center {
    text-align: center;
}


/* =========================================================
   BOOTSTRAP ALIGNMENT HELPERS
   Keeps Bootstrap buttons visually closer to StrataFleet tone
   ========================================================= */

.btn {
    font-weight: 700;
    transition:
        transform var(--sf-transition-base),
        box-shadow var(--sf-transition-base),
        border-color var(--sf-transition-base),
        background var(--sf-transition-base),
        color var(--sf-transition-base);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--sf-focus-ring);
}

.btn.btn-outline-warning {
    color: #fde68a;
    border-color: rgba(245, 158, 11, 0.24);
    background: rgba(120, 53, 15, 0.16);
}

.btn.btn-outline-warning:hover {
    color: #fff7d6;
    border-color: rgba(245, 158, 11, 0.34);
    background: rgba(120, 53, 15, 0.28);
}


/* =========================================================
   RESPONSIVE TYPE
   ========================================================= */

@media (max-width: 860px) {
    .sf-heading-1 {
        font-size: 1.8rem;
    }

    .sf-heading-2 {
        font-size: 1.16rem;
    }
}