/* ============================================= */
/*              Auto-Scaling Responsive UI       */
/* ============================================= */

:root {
    --primary: #0ea5e9;
    --primary-dark: #0c4a6e;
    --accent: #38bdf8;
    --text: #020427;
    --bg: #f8f9fa;
    --shadow: 0 8px 16px rgba(0, 0, 0, 0.1);

    /* Typography that scales with screen size */
    --fs-xl: clamp(1.8rem, 3vw + 1rem, 3rem);
    --fs-lg: clamp(1.4rem, 2vw + 0.8rem, 2.2rem);
    --fs-md: clamp(1.1rem, 1vw + 0.7rem, 1.5rem);
    --fs-sm: clamp(0.9rem, 0.5vw + 0.6rem, 1.1rem);
    --fs-xs: clamp(0.75rem, 0.5vw + 0.4rem, 1rem);

    /* Scalable spacing */
    --space-lg: clamp(2rem, 4vw, 4rem);
    --space-md: clamp(1rem, 2vw, 2rem);
    --space-sm: clamp(0.5rem, 1vw, 1.2rem);

    /* Smooth animations */
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    overflow-x: hidden;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: "Poppins", sans-serif;
    line-height: 1.7;
}

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

h1 { font-size: var(--fs-xl); }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-md); }
p, a, li, button, input {
    font-size: var(--fs-sm);
}

/* ============================================= */
/*                  CONTAINER                    */
/* ============================================= */

.container {
    width: 100%;
    max-width: 1450px;
    padding: 0 var(--space-sm);
    margin: auto;
}

/* ============================================= */
/*                   NAVBAR                      */
/* ============================================= */

.modern-navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.07);
    padding: var(--space-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand img {
    height: clamp(60px, 10vw, 130px);
    width: auto;
    object-fit: contain;
    transition: height 0.2s ease;
}

.nav-link {
    font-size: var(--fs-sm);
    padding: var(--space-sm) var(--space-md) !important;
    border-radius: 10px;
    color: var(--text) !important;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary) !important;
    background: rgba(14, 165, 233, 0.12);
    transform: translateY(-2px);
}

.nav-link i {
    margin-right: 0.4rem;
    color: var(--primary);
}

/* Wallet */
.wallet-balance {
    background: var(--primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: 50px;
    font-size: var(--fs-sm);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.wallet-balance:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(14, 165, 233, 0.3);
}

/* Mini profile */
.user-profile-mini {
    display: flex;
    align-items: center;
    padding: var(--space-sm);
    border-radius: 40px;
    background: #f8f9fa;
    transition: var(--transition);
}

.user-profile-mini:hover {
    background: #ececec;
}

.user-avatar {
    width: clamp(35px, 5vw, 45px);
    height: clamp(35px, 5vw, 45px);
    border-radius: 50%;
    object-fit: cover;
}

/* ============================================= */
/*                  CARDS                        */
/* ============================================= */

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: var(--space-md);
    padding: var(--space-md);
}

.card {
    background: white;
    box-shadow: var(--shadow);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 25px rgba(14, 165, 233, 0.2);
}

.card img {
    width: 100%;
    height: clamp(160px, 25vw, 250px);
    object-fit: cover;
}

.card h3 {
    font-size: var(--fs-md);
    padding: var(--space-sm) var(--space-md);
}

.card p {
    padding: 0 var(--space-md) var(--space-md);
    color: #444;
}

.card .btn {
    margin: var(--space-sm) var(--space-md) var(--space-md);
}

/* ============================================= */
/*                  BUTTONS                      */
/* ============================================= */

.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;

    /* ✅ Button shrinks with screen size */
    font-size: clamp(0.75rem, 1vw, 1rem);
    padding: clamp(0.35rem, 1vw, 0.6rem)
             clamp(0.7rem, 2vw, 1.2rem);

    border-radius: clamp(8px, 2vw, 12px);
    width: fit-content;
    max-width: 100%;
}

/* ✅ Center buttons in cards */
.card .btn {
    margin: 0.7rem auto;
    display: block;
}


.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ============================================= */
/*                  TABS                         */
/* ============================================= */

.tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin: var(--space-lg) 0;
}

.tabs button {
    font-size: clamp(0.7rem, 1vw, 1rem);
    padding: clamp(0.35rem, 1vw, 0.6rem)
             clamp(0.8rem, 3vw, 1.4rem);
    border: 2px solid var(--primary);
    background: transparent;
    border-radius: 25px;
    transition: var(--transition);
    cursor: pointer;
}

.tabs button.active,
.tabs button:hover {
    background: var(--primary);
    color: white;
}

/* ============================================= */
/*                  FOOTER                       */
/* ============================================= */

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
    padding-bottom: var(--space-lg);
}

/* ============================================= */
/*             TOUCH & ACCESSIBILITY             */
/* ============================================= */

a, button, .btn, .nav-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    * { 
        transition: none !important;
        animation: none !important;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.35rem 0.75rem;
        font-size: 0.75rem;
    }
}