/* ============================================
   Playful Pop UI kit — 共用（登入 / 學生主頁）
   明亮、圓潤、立體按鈕、童趣但不雜亂（無玻璃 / 無 HUD）
   ============================================ */

:root {
    --pp-brand: #00b6ed;
    --pp-brand-hi: #16c2f5;
    --pp-brand-dark: #009bcd;
    --pp-ink: #27384a;
    --pp-ink-soft: #6b7c8c;

    --pp-purple: #7c5cd4; --pp-purple-soft: #efe9ff; --pp-purple-bd: #d9c9ff;
    --pp-blue:   #0a93d6; --pp-blue-soft:   #e1f4ff; --pp-blue-bd:   #bfe6fb;
    --pp-gold:   #e6960f; --pp-gold-soft:   #fff3d6; --pp-gold-bd:   #ffe09c;
}

* { box-sizing: border-box; }

html,
body {
    margin: 0;
}

.pp-page {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 20px;
    font-family: 'Fredoka', 'Noto Sans TC', 'Microsoft JhengHei', 'Segoe UI', sans-serif;
    background: linear-gradient(165deg, #cdeeff 0%, #e4f5ee 55%, #dbf7e7 100%);
}

/* 圓潤白卡：厚實圓角 + 立體陰影（無玻璃模糊） */
.pp-card {
    background: #ffffff;
    border: 2px solid #eaf2f7;
    border-radius: 28px;
    box-shadow: 0 14px 0 -4px rgba(0, 182, 237, 0.10), 0 26px 44px rgba(20, 60, 90, 0.16);
}

/* 立體大按鈕 */
.pp-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 10px;
    border: none; cursor: pointer;
    font-family: inherit; font-size: 20px; font-weight: 600; letter-spacing: 1px;
    color: #ffffff; background: var(--pp-brand);
    border-radius: 16px; height: 58px; padding: 0 24px;
    box-shadow: 0 6px 0 var(--pp-brand-dark);
    transition: transform 0.08s ease, box-shadow 0.08s ease, background-color 0.15s ease;
}
.pp-btn:hover { background: var(--pp-brand-hi); }
.pp-btn:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--pp-brand-dark); }
.pp-btn:disabled { background: #9bd9ec; box-shadow: 0 6px 0 #7fbdd0; cursor: not-allowed; }

/* 友善輸入框 */
.pp-field { display: flex; flex-direction: column; gap: 8px; }
.pp-label { font-size: 15px; font-weight: 600; color: var(--pp-ink); padding-left: 4px; }
.pp-input-wrap { position: relative; }
.pp-input-ico {
    position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
    color: var(--pp-brand); font-size: 17px; pointer-events: none;
}
.pp-input {
    width: 100%; height: 56px;
    padding: 0 18px 0 48px;
    font-family: inherit; font-size: 16px; color: var(--pp-ink);
    background: #eef7fb; border: 2px solid #dcebf3; border-radius: 16px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.pp-input::placeholder { color: #9fb1bd; }
.pp-input:focus { outline: none; border-color: var(--pp-brand); background: #fff; box-shadow: 0 0 0 4px rgba(0, 182, 237, 0.18); }

/* 訊息 */
.pp-msg { font-size: 14px; border-radius: 14px; padding: 11px 15px; }
.pp-msg-error { background: #ffe9e7; border: 2px solid #ffc4bd; color: #c63a2e; }