@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&family=Inter:wght@300;400;500;600&display=swap');

:root {
    --font-sans: 'DM Sans', 'Inter', sans-serif;
    --color-primary: #000000;
    --color-secondary: #5e5e5d;
    --color-bg-light: #ffffff;
    --color-bg-dark: #121212;
    --color-border: #e2e8f0;
}

html {
    scroll-behavior: smooth;
    font-family: var(--font-sans);
}

body {
    background-color: var(--color-bg-light);
    color: var(--color-primary);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Custom Selection style */
::selection {
    background-color: var(--color-primary);
    color: #ffffff;
}

/* Premium Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Base custom interactive transitions */
a, button, img, input, textarea {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Navigation Link hover effect */
.nav-link {
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--color-primary);
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}
.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* Dynamic Filter Transition */
.project-card {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.project-card.hidden-card {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

/* Smooth page fade-in on load */
.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Staggered animation delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }

/* Custom utility: border bottom hover button */
.editorial-button {
    border: 1px solid var(--color-primary);
    background-color: var(--color-primary);
    color: #ffffff;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.editorial-button:hover {
    background-color: transparent;
    color: var(--color-primary);
}

/* Form floating inputs border highlights */
.form-input-underline:focus-within label {
    color: var(--color-primary);
    transform: translateY(-2px);
}
.form-input-underline input:focus, .form-input-underline textarea:focus {
    border-color: var(--color-primary);
}

/* Smart Header Scroll Behavior */
header {
    transition: transform 0.3s ease-in-out !important;
}
.header-hidden {
    transform: translateY(-100%) !important;
}