/* ── BUTTONS ── */
.btn {
    border-radius: var(--ds-radius-btn);
    font-family: var(--ds-font-family);
    font-weight: var(--ds-font-weight-semibold);
    padding: 0.6rem 1.4rem;
    transition: var(--ds-transition);
    font-size: 0.88rem;
    box-shadow: var(--ds-shadow-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn:active, .btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(43, 79, 146, 0.25);
}

/* Primary Button (BTC Color) */
.btn-btc {
    background-color: var(--ds-accent);
    border-color: var(--ds-accent);
    color: #fff !important;
    box-shadow: 0 6px 16px rgba(10, 186, 181, 0.18);
}

.btn-btc:hover {
    background-color: #09a7a2;
    border-color: #09a7a2;
    color: #fff !important;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(10, 186, 181, 0.28);
}

.btn-btc:disabled {
    background-color: #cbd5e1;
    border-color: #cbd5e1;
    color: #64748b !important;
    box-shadow: none;
    transform: none;
}

/* Outline Button */
.btn-outline-btc {
    background-color: transparent;
    border-color: rgba(10, 186, 181, 0.4);
    color: var(--ds-accent) !important;
    border-width: 1.5px;
}

.btn-outline-btc:hover {
    background-color: rgba(10, 186, 181, 0.08);
    border-color: var(--ds-accent);
    color: var(--ds-accent) !important;
    transform: translateY(-1px);
}

/* Hero Primary Button */
.hero-btn-primary {
    background-color: #fff;
    color: var(--ds-dark) !important;
    border: none;
    padding: 0.75rem 1.6rem;
    font-size: 0.9rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.hero-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
    color: var(--ds-dark) !important;
}

/* Hero Outline Button */
.hero-btn-outline {
    background-color: transparent;
    color: #fff !important;
    border: 1.5px solid rgba(255, 255, 255, 0.45);
    padding: 0.75rem 1.6rem;
    font-size: 0.9rem;
}

.hero-btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.12);
    border-color: #fff;
    transform: translateY(-2px);
}

/* Navbar Icon Buttons */
.nav-auth-icons {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-nav-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    line-height: 1;
    transition: var(--ds-transition);
}

.btn-nav-icon:hover {
    transform: translateY(-2px);
}

.btn-nav-icon-login {
    border: 2px solid var(--ds-accent);
    color: var(--ds-accent);
    background: transparent;
}

.btn-nav-icon-login:hover {
    background: rgba(10, 186, 181, 0.1);
    color: var(--ds-accent);
}

.btn-nav-icon-register {
    background: var(--ds-accent);
    border: 2px solid var(--ds-accent);
    color: #fff;
    box-shadow: 0 6px 14px rgba(10, 186, 181, 0.28);
}

.btn-nav-icon-register:hover {
    background: #09a7a2;
    border-color: #09a7a2;
    color: #fff;
}

/* ── FLOATING WHATSAPP ── */
.floating-wa-btn {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 1040;
    width: 54px;
    height: 54px;
    border-radius: var(--ds-radius-btn);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #25D366;
    color: #fff !important;
    font-size: 24px;
    text-decoration: none;
    box-shadow: 0 10px 22px rgba(37, 211, 102, 0.35);
    transition: var(--ds-transition);
}

.floating-wa-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 16px 28px rgba(37, 211, 102, 0.45);
    color: #fff !important;
}

/* Tooltip on Whatsapp hover */
.floating-wa-btn::before {
    content: "Tanya Kami via WhatsApp";
    position: absolute;
    right: 64px;
    background: #1f2937;
    color: #fff;
    font-size: 0.76rem;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--ds-transition);
    box-shadow: var(--ds-shadow);
}

.floating-wa-btn:hover::before {
    opacity: 1;
    visibility: visible;
}

/* ── CARDS (Penyeragaman Global) ── */
.ds-card {
    background: #fff;
    border-radius: var(--ds-radius);
    box-shadow: var(--ds-shadow);
    border: 1px solid var(--ds-border);
    transition: var(--ds-transition);
    padding: 1.5rem;
    height: 100%;
}

.ds-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--ds-shadow-hover);
}