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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    min-height: 100vh;
}

/* ========== CUSTOM SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f8fafc;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* ========== NAVBAR ========== */
#navbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

/* ========== FLOATING CARDS ========== */
.floating-card {
    z-index: 10;
}

.card-float-1 {
    animation: float1 5s ease-in-out infinite;
}

.card-float-2 {
    animation: float2 6s ease-in-out infinite;
}

.card-float-3 {
    animation: float3 5.5s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-14px) rotate(1deg); }
}

@keyframes float2 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(-1deg); }
}

@keyframes float3 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(0.5deg); }
}

/* ========== MOBILE MENU ========== */
.mobile-link {
    position: relative;
}

.mobile-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #0D9488;
    transition: width 0.2s ease;
}

.mobile-link:hover::after {
    width: 100%;
}

/* ========== SCROLL REVEAL ANIMATIONS ========== */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ========== SECTION DIVIDER ========== */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #e2e8f0, transparent);
}

/* ========== FOCUS STYLES ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #0D9488;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ========== SELECTION ========== */
::selection {
    background: #ccfbf1;
    color: #0d5f59;
}

/* ========== UTILITY: stagger children ========== */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-children.stagger-revealed > * {
    opacity: 1;
    transform: translateY(0);
}

.stagger-children.stagger-revealed > *:nth-child(1) { transition-delay: 0.05s; }
.stagger-children.stagger-revealed > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.stagger-revealed > *:nth-child(3) { transition-delay: 0.15s; }
.stagger-children.stagger-revealed > *:nth-child(4) { transition-delay: 0.2s; }
.stagger-children.stagger-revealed > *:nth-child(5) { transition-delay: 0.25s; }
.stagger-children.stagger-revealed > *:nth-child(6) { transition-delay: 0.3s; }