/**
 * Vrenum UI — Unified Design System
 * Brand: Tinder Red #FE3C72
 * Version: 1.0 — Phase 1
 */

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

/* ─── TOKENS ─────────────────────────────────────────────────────────────── */
:root {
    /* Brand */
    --nsk-red:          #FE3C72;
    --nsk-red-dark:     #E0245E;
    --nsk-red-light:    #FFF0F3;
    --nsk-red-glow:     rgba(254, 60, 114, 0.25);
    --nsk-red-border:   rgba(254, 60, 114, 0.3);

    /* Neutrals */
    --nsk-white:        #ffffff;
    --nsk-bg:           #f9fafb;
    --nsk-surface:      #ffffff;
    --nsk-border:       #f0f0f0;
    --nsk-border-dark:  #e5e7eb;
    --nsk-text:         #21262D;
    --nsk-text-2:       #656E77;
    --nsk-text-3:       #9CA3AF;

    /* Status */
    --nsk-green:        #01DF8A;
    --nsk-green-dark:   #00C278;
    --nsk-green-bg:     rgba(1, 223, 138, 0.1);
    --nsk-yellow:       #f59e0b;
    --nsk-yellow-bg:    rgba(245, 158, 11, 0.1);
    --nsk-error:        #ef4444;
    --nsk-error-bg:     rgba(239, 68, 68, 0.1);
    --nsk-blue:         #0ea5e9;
    --nsk-blue-bg:      rgba(14, 165, 233, 0.1);

    /* Shadows */
    --nsk-shadow-xs:    0 1px 2px rgba(0,0,0,0.05);
    --nsk-shadow-sm:    0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --nsk-shadow-md:    0 4px 12px rgba(0,0,0,0.08);
    --nsk-shadow-lg:    0 10px 40px rgba(0,0,0,0.10);
    --nsk-shadow-red:   0 4px 20px rgba(254, 60, 114, 0.3);

    /* Radius */
    --nsk-r-sm:         6px;
    --nsk-r-md:         10px;
    --nsk-r-lg:         14px;
    --nsk-r-xl:         20px;
    --nsk-r-full:       9999px;

    /* Spacing */
    --nsk-s1: 4px;
    --nsk-s2: 8px;
    --nsk-s3: 12px;
    --nsk-s4: 16px;
    --nsk-s5: 20px;
    --nsk-s6: 24px;
    --nsk-s8: 32px;
    --nsk-s10: 40px;
    --nsk-s12: 48px;

    /* Transitions */
    --nsk-t-fast:   150ms ease;
    --nsk-t-base:   200ms ease;
    --nsk-t-slow:   300ms ease;

    /* Typography */
    --nsk-font:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --nsk-mono:     'Fira Code', 'Courier New', monospace;
}

/* ─── BASE ───────────────────────────────────────────────────────────────── */
body {
    font-family: var(--nsk-font);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ─── BUTTONS ────────────────────────────────────────────────────────────── */
.nsk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--nsk-s2);
    padding: 10px 20px;
    border: none;
    border-radius: var(--nsk-r-md);
    font-family: var(--nsk-font);
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: all var(--nsk-t-base);
    white-space: nowrap;
    text-decoration: none;
}

.nsk-btn:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.nsk-btn-primary {
    background: linear-gradient(135deg, var(--nsk-red) 0%, var(--nsk-red-dark) 100%);
    color: white;
    box-shadow: var(--nsk-shadow-red);
}
.nsk-btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(254, 60, 114, 0.4);
}
.nsk-btn-primary:active:not(:disabled) { transform: translateY(0); }

.nsk-btn-secondary {
    background: var(--nsk-white);
    color: var(--nsk-red);
    border: 1.5px solid var(--nsk-red-border);
}
.nsk-btn-secondary:hover:not(:disabled) {
    background: var(--nsk-red-light);
    border-color: var(--nsk-red);
}

.nsk-btn-ghost {
    background: transparent;
    color: var(--nsk-text-2);
    border: 1px solid var(--nsk-border-dark);
}
.nsk-btn-ghost:hover:not(:disabled) {
    background: var(--nsk-bg);
    color: var(--nsk-red);
    border-color: var(--nsk-red-border);
}

.nsk-btn-success {
    background: linear-gradient(135deg, var(--nsk-green) 0%, var(--nsk-green-dark) 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(1, 223, 138, 0.3);
}
.nsk-btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(1, 223, 138, 0.4);
}

.nsk-btn-danger {
    background: var(--nsk-error);
    color: white;
}
.nsk-btn-danger:hover:not(:disabled) { background: #dc2626; }

.nsk-btn-sm { padding: 6px 14px; font-size: 13px; }
.nsk-btn-lg { padding: 14px 28px; font-size: 16px; }
.nsk-btn-block { width: 100%; }

/* ─── CARDS ──────────────────────────────────────────────────────────────── */
.nsk-card {
    background: var(--nsk-surface);
    border-radius: var(--nsk-r-lg);
    border: 1px solid var(--nsk-border);
    padding: var(--nsk-s6);
    box-shadow: var(--nsk-shadow-sm);
    transition: box-shadow var(--nsk-t-base);
}
.nsk-card:hover { box-shadow: var(--nsk-shadow-md); }

.nsk-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--nsk-s4);
    padding-bottom: var(--nsk-s4);
    border-bottom: 1px solid var(--nsk-border);
}

/* ─── BADGES ─────────────────────────────────────────────────────────────── */
.nsk-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: var(--nsk-r-full);
    font-size: 12px;
    font-weight: 600;
}
.nsk-badge-red    { background: var(--nsk-red-light); color: var(--nsk-red); }
.nsk-badge-green  { background: var(--nsk-green-bg);  color: var(--nsk-green-dark); }
.nsk-badge-yellow { background: var(--nsk-yellow-bg); color: #92400e; }
.nsk-badge-blue   { background: var(--nsk-blue-bg);   color: #0369a1; }
.nsk-badge-error  { background: var(--nsk-error-bg);  color: var(--nsk-error); }

/* ─── FORMS ──────────────────────────────────────────────────────────────── */
.nsk-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--nsk-border-dark);
    border-radius: var(--nsk-r-md);
    font-family: var(--nsk-font);
    font-size: 14px;
    color: var(--nsk-text);
    background: var(--nsk-white);
    transition: all var(--nsk-t-fast);
    outline: none;
}
.nsk-input:focus {
    border-color: var(--nsk-red);
    box-shadow: 0 0 0 3px var(--nsk-red-glow);
}
.nsk-input::placeholder { color: var(--nsk-text-3); }

.nsk-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--nsk-text);
    margin-bottom: 6px;
}

/* ─── STAT CARDS ─────────────────────────────────────────────────────────── */
.nsk-stat {
    background: var(--nsk-surface);
    border-radius: var(--nsk-r-md);
    border: 1px solid var(--nsk-border);
    padding: 14px 16px;
    box-shadow: var(--nsk-shadow-sm);
}
.nsk-stat-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--nsk-text-3);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 6px;
}
.nsk-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--nsk-text);
    line-height: 1.1;
    margin-bottom: 2px;
}
.nsk-stat-value.red   { color: var(--nsk-red); }
.nsk-stat-value.green { color: var(--nsk-green-dark); }

/* ─── TIER BADGES ────────────────────────────────────────────────────────── */
.nsk-tier {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--nsk-r-full);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}
.nsk-tier-freemium { background: var(--nsk-green-bg);  color: var(--nsk-green-dark); }
.nsk-tier-payg     { background: rgba(255,120,84,0.12); color: #E85D3A; }
.nsk-tier-pro      { background: var(--nsk-red-light);  color: var(--nsk-red-dark); }
.nsk-tier-custom   { background: rgba(124,58,237,0.1);  color: #7C3AED; }

/* ─── ANIMATIONS ─────────────────────────────────────────────────────────── */
@keyframes nsk-fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes nsk-fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes nsk-pulse-red {
    0%, 100% { box-shadow: 0 0 0 0 var(--nsk-red-glow); }
    50%       { box-shadow: 0 0 0 8px transparent; }
}
@keyframes nsk-spin {
    to { transform: rotate(360deg); }
}
@keyframes nsk-shimmer {
    0%   { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}

.nsk-fade-up  { animation: nsk-fade-up  var(--nsk-t-slow) ease both; }
.nsk-fade-in  { animation: nsk-fade-in  var(--nsk-t-base) ease both; }

/* ─── LOADING ────────────────────────────────────────────────────────────── */
.nsk-spinner {
    width: 20px; height: 20px;
    border: 2px solid var(--nsk-border-dark);
    border-top-color: var(--nsk-red);
    border-radius: 50%;
    animation: nsk-spin 0.8s linear infinite;
    display: inline-block;
}
.nsk-spinner-lg { width: 36px; height: 36px; border-width: 3px; }

.nsk-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e8e8e8 50%, #f0f0f0 75%);
    background-size: 400px 100%;
    animation: nsk-shimmer 1.4s ease infinite;
    border-radius: var(--nsk-r-sm);
}

/* ─── DIVIDER ────────────────────────────────────────────────────────────── */
.nsk-divider {
    height: 1px;
    background: var(--nsk-border);
    margin: var(--nsk-s4) 0;
}

/* ─── RESPONSIVE HELPERS ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .nsk-hide-mobile { display: none !important; }
    .nsk-btn-block-mobile { width: 100%; }
}
@media (min-width: 769px) {
    .nsk-hide-desktop { display: none !important; }
}