html {
    font-size: 16px;
}
#mobile-nav {
    position: fixed;
}
#feed-container {
    height: 100dvh;
    touch-action: pan-y;
    overscroll-behavior: contain;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: auto;
}
#feed-container *:not(.material-symbols-outlined) {
    font-family: 'Plus Jakarta Sans';
}
.material-symbols-outlined {
    color: var(--accent-light);
}
#feed-container::-webkit-scrollbar { display: none; }
#feed-container { scrollbar-width: none; }


/* intro */
#idea-flow-idea {
    width: 80%;
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1;
    text-align: left;
    align-items: start;
}
#idea-flow-idea h1 {
    font-size: 4rem;
    font-weight: 700;
    font-family: var(--font-titles);
    text-align: center;
}
#idea-flow-idea p {
    font-size: 27px;
    font-weight: bold;
    font-family: var(--font-titles);
    padding-bottom: 10px;
    margin-bottom: 20px;
    color: var(--primary-saturated);
}

/* idea card */
.idea-card {
    height: 100dvh;
    width: 100%;
    scroll-snap-align: start;
    scroll-behavior: stop;
    scroll-snap-stop: always;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.gradient-bg {
    position: absolute;
    inset: 0;
    background-size: 400% 400%;
    animation: gradientMove 14s ease infinite;
    z-index: 0;
}
@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* cards */
.glass {
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.35);
}
.card-box {
    box-sizing: border-box;
    position: relative;
    z-index: 10;
    width: 80%;
    max-width: 300px;
    aspect-ratio: 1/1;
    padding: 20px;
    border-radius: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 15px;
    text-align: center;
    box-shadow: 0 10px 15px rgba(0,0,0,0.2);
    transform: translateY(-25px);
}
.card-category {
    display: inline-block;
    width: 50%;
    background-color: rgba(255, 87, 36, 0.1);
    color: var(--accent-light);
    padding: 5px 10px;
    border-radius: 9999px;
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 auto;
}
.card-title {
    color: #23140f;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
}
.card-desc {
    font-size: 16px;
    margin-bottom: 24px;
    color: rgba(35,20,15,0.8);
    line-height: 1.5;
}
.card-hr {
    width: 30%;
    height: 2px;
    background-color: var(--accent-light);
    margin: 10px auto;
    border: none;
}

/* Footer */
.card-footer {
    position: absolute;
    bottom: 10px;
    padding: 1rem 0 2rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 20;
    color: rgba(35, 20, 15, 0.7);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 14px;
}
.card-footer .material-symbols-outlined {
    font-size: 30px;
    color: var(--accent-light);
    display: inline-block;
    animation: vertical-vibrate 1.2s ease-in-out infinite;
}
@keyframes vertical-vibrate {
    0%   { transform: translateY(0); }
    20%  { transform: translateY(-2px); }
    40%  { transform: translateY(2px); }
    60%  { transform: translateY(-1px); }
    80%  { transform: translateY(1px); }
    100% { transform: translateY(0); }
}


/* Right Action Buttons */
.action-bar {
    position: absolute;
    right: 24px;
    bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    z-index: 20;
}
.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}
.action-btn .btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: var(--accent-light);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background 0.2s ease;
}
.action-btn .btn-icon:hover {
    background-color: rgba(255, 255, 255, 0.6);
}
.action-btn > span {
    font-size: 12px;
}
.action-btn .btn-icon span {
    font-size: 20px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-light);
}