static/custom.css

/* ----------------- */
/* 🌞 Base Light Theme */
/* ----------------- */
body {
    background-color: #f4f6f8;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 16px;
    color: #212529;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: auto;
    padding: 2em;
}

/* Typography */
h1, h2, h3, h4, h5, h6,
p, li, label, span {
    color: #1e2b3a;
    margin-bottom: 1em;
    font-weight: 500;
}

/* Cards */
.card {
    background: linear-gradient(to bottom right, #ffffff, #f9fbfd);
    border-radius: 14px;
    padding: 2em;
    box-shadow: 0 6px 16px rgba(0,0,0,0.05);
    margin-bottom: 2em;
    animation: fadeInUp 0.4s ease forwards;
}

/* Inputs */
input[type="text"], select, textarea {
    width: 100%;
    padding: 0.75em 1em;
    border: 1px solid #ced4da;
    border-radius: 10px;
    background-color: #ffffff;
    font-size: 1rem;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s, transform 0.2s;
}

input:focus, textarea:focus, select:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.2);
    transform: scale(1.01);
}

/* Buttons */
button, .btn {
    background: linear-gradient(to right, #0d6efd, #0b5ed7);
    border: none;
    color: #ffffff;
    padding: 0.75em 1.5em;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
}

button:hover, .btn:hover {
    background: linear-gradient(to right, #0b5ed7, #0a53be);
}

button:active, .btn:active {
    transform: scale(0.96);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15) inset;
}

/* Navigation (Light Mode) */
.navbar,
.nav-tabs,
.nav-link,
.nav-item {
    background-color: #ffffff;
    color: #212529;
    border-color: #dee2e6;
    transition: background-color 0.3s, color 0.3s;
}

.nav-link.active {
    background-color: #e9ecef;
    color: #000;
}


/* ----------------- */
/* ✨ Animations */
/* ----------------- */

/* Global transition for everything */
body, body * {
    transition:
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.2s ease;
}

/* Fade-in for cards */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Nav hover underline */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background-color: currentColor;
    transition: width 0.3s ease;
}

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

/* Modal / panel zoom-in (if you use them) */
.modal, .panel, .popup {
    opacity: 0;
    transform: scale(0.96);
    animation: zoomIn 0.3s ease forwards;
}

@keyframes zoomIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Tab transition */
.tab-pane {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tab-pane.active {
    opacity: 1;
}