/* IMPORT */

@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Pixelify+Sans:wght@400..700&family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900&family=VT323&display=swap');

/* animations */

@keyframes floatPenguin {
    0%, 100% { transform: translateY(0px); }
    50%       { transform: translateY(-10px); }
}

@keyframes fadeUp {
    from { transform: translateY(20px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

/* general */

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

html, body { height: 100%; }

body {
    background-color: #ffffff;
    font-family: "Poppins", sans-serif;
    color: #1a1a1a;
    font-size: 14px;
}

a { color: inherit; text-decoration: none; transition: opacity 0.2s ease; }
a:hover { opacity: 0.7; }

/* page grid */

.page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas:
        "hero    contact"
        "content content";
    height: 100vh;
    gap: 1.5rem;
    padding: 1.5rem;
    overflow: hidden;
}

/* section titles */

.title_1, .title_2 {
    font-family: "Pixelify Sans", sans-serif;
    font-size: 1.8rem;
    font-weight: 400;
    color: #1a1a1a;
    text-transform: capitalize;
    margin-bottom: 1rem;
}

/* hero */

#hero {
    grid-area: hero;
    background: #f0f0f0;
    border-radius: 1.2rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeUp 0.7s ease both;
    min-height: 0;
}

.hero-top {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.character-container { display: flex; align-items: center; flex-shrink: 0; }

.character {
    height: 100px;
    animation: floatPenguin 3.6s ease-in-out infinite;
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.12));
}

.hero_text-container { display: flex; align-items: center; }

.updates-container {
    background: #e0e0e0;
    border-radius: 0.8rem;
    padding: 0.8rem 1rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.updates-label {
    font-family: "Pixelify Sans", sans-serif;
    font-size: 0.85rem;
    color: #888;
    display: block;
    margin-bottom: 0.5rem;
    text-transform: lowercase;
}

.updates-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.updates-list li {
    font-size: 0.8rem;
    color: #444;
    padding-left: 0.9rem;
    position: relative;
    line-height: 1.4;
}

.updates-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #aaa;
}

.hero_text {
    font-family: "Pixelify Sans", sans-serif;
    font-weight: 400;
    font-size: 2.2rem;
    line-height: 1.25;
    color: #1a1a1a;
}

.hero_text:hover { cursor: default; }

/* contact */

#contact {
    grid-area: contact;
    background: #f0f0f0;
    border-radius: 1.2rem;
    padding: 2rem;
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 2rem;
    animation: fadeUp 0.7s ease 0.1s both;
    min-height: 0;
}

.contact-left {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex-shrink: 0;
}

.contact-right {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.8rem;
    flex: 1;
    background: rgb(59, 68, 83);
    border-radius: 0.8rem;
    padding: 1rem 1.2rem;
    border: none;
}

.about-text {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
}

.studying-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255,255,255,0.12);
    border-radius: 0.8rem;
    padding: 0.4rem 1rem;
    font-size: 0.82rem;
    color: #ffffff;
    font-weight: 500;
    width: fit-content;
}

.contact-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: #e0e0e0;
    padding: 0.8rem 1.4rem;
    border-radius: 0.8rem;
    font-size: 1rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.contact-container a {
    position: relative;
    padding-bottom: 2px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.contact-icon {
    width: 16px;
    height: 16px;
    object-fit: contain;
    flex-shrink: 0;
}

.icon-attribution {
    font-size: 0.7rem;
    color: #aaa;
    margin-top: 0.5rem;
}

.icon-attribution a {
    color: #aaa;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.contact-container a::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0%; height: 1.5px;
    background-color: #1a1a1a;
    transition: width 0.25s ease;
}

.contact-container a:hover { opacity: 1; }
.contact-container a:hover::after { width: 100%; }

/* content */

#content {
    grid-area: content;
    background: #f0f0f0;
    border-radius: 1.2rem;
    padding: 2rem;
    animation: fadeUp 0.7s ease 0.2s both;
    min-height: 0;
}

.content-container {
    display: flex;
    gap: 1.5rem;
    align-items: stretch;
}

.notes-container {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    flex: 1;
}

/* note cards */
.intro-container,
.kinematics-container,
.applications-nlaw-container {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: 72px;
    width: 100%;
    border-radius: 0.8rem;
    background: #e0e0e0;
    border: none;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    animation: fadeUp 0.6s ease both;
    font-size: 0.95rem;
    font-weight: 500;
}

.intro-container          { animation-delay: 0.15s; }
.kinematics-container     { animation-delay: 0.22s; }
.applications-nlaw-container { animation-delay: 0.29s; }

.intro-container:hover,
.kinematics-container:hover,
.applications-nlaw-container:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.10);
    background: #d4d4d4;
}

.intro-container a,
.kinematics-container a,
.applications-nlaw-container a {
    display: flex;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

.intro-container a:hover,
.kinematics-container a:hover,
.applications-nlaw-container a:hover { opacity: 1; }

/* sim cards wrapper */
.sims-container {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    flex: 0 0 auto;
}

/* sim cards — kinematics and newton's */
.kinematics-sim-card,
.newtons-sim-container {
    width: 220px;
    border-radius: 0.8rem;
    background: rgb(59, 68, 83);
    border: none;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    animation: fadeUp 0.6s ease 0.08s both;
    overflow: hidden;
}

.kinematics-sim-card a,
.newtons-sim-container a {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    opacity: 1;
}

.kinematics-sim-card:hover,
.newtons-sim-container:hover { transform: translateY(-3px); box-shadow: 0 6px 18px rgba(0,0,0,0.12); }
.kinematics-sim-card:hover .sim-preview,
.newtons-sim-container:hover .sim-preview { opacity: 0.85; }

.kinematics-sim-card a:hover,
.newtons-sim-container a:hover { opacity: 1; }

.sim-image-wrap {
    width: 100%;
    height: 140px;
    overflow: hidden;
    border-radius: 0.8rem 0.8rem 0 0;
    flex-shrink: 0;
}

.sim-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
    transition: opacity 0.2s ease;
}

.sim-info {
    padding: 0.8rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    background: rgb(59, 68, 83);
    text-align: left;
}

.sim-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #ffffff;
}

.sim-desc {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.4;
}

.extra {
    font-size: 0.8rem;
    color: #999;
    margin-top: 0.4rem;
    text-align: center;
}

.extra:hover { cursor: default; }